causes and effects essay

Cause And Effect Essay Writing

How to Write Cause and Effect Essays in Simple Steps

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Published on: Mar 13, 2020

Last updated on: Mar 25, 2024

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Are you struggling to wrap your head around cause and effect essays? Don’t worry; you’re not alone. 

These essays might seem complex at first glance, but with the right approach, they can become easier to write.

In this comprehensive guide, we'll look into what cause and effect essays are, how to structure them, and provide valuable tips and examples to help you understand this type of writing.

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What is a Cause and Effect Essay?

A cause and effect essay is a type of essay writing that explores the relationship between events, actions, or phenomena (causes) and their outcomes or consequences (effects) . 

In this type of essay, the writer analyzes how one event leads to another, providing insights into the underlying causes and the resulting effects. Cause and effect essays aim to explain the connections between various occurrences and explain the reasons behind certain outcomes. 

They often require critical thinking, careful analysis, and the use of evidence and examples to support arguments.

You may confuse cause-and-effect essays with compare and contrast essays . While cause and effect essays focus on analyzing the relationship between events, compare and contrast essays examine similarities and differences between two or more subjects or ideas.

How to Structure a Cause and Effect Essay

There are two main structural types commonly used to write a cause and effect essay: the block structure and the chain structure.

Block Structure

In the block structure, the writer first discusses all the causes of the event in one section, followed by a separate section dedicated to discussing all the effects.

This cause and effect essay format allows for a clear separation between the causes and effects, making it easier for the reader to understand the relationships between them.

Use the block structure when:

• There are multiple causes and effects to discuss, and you want to provide a comprehensive overview of each.
• You prefer a clear separation between causes and effects for easier understanding.

Chain Structure

In the chain structure, each cause is followed immediately by its corresponding effect(s), creating a chain-like sequence of events.

This structure emphasizes the direct relationship between each cause and its effect, providing a more immediate and interconnected narrative.

Use the chain structure when:

• You want to emphasize the direct relationship between each cause and its effect.
• You're discussing a series of events that occur in a linear or chronological order.

Cause and Effect Essay Outline

Creating an outline is essential for organizing your thoughts and structuring your cause and effect essay effectively. 

Here's a basic outline to guide you through the writing process:

Need a detailed outline guide? Be sure to check out our blog on " Cause and Effect Essay Outline " for a comprehensive breakdown of how to organize your essay.

How to Write a Cause and Effect Essay

Writing a cause and effect essay involves examining the reasons (causes) and outcomes (effects) of a particular event, phenomenon, or situation. Here's a step-by-step guide to help you craft an effective cause and effect essay:

Step 1: Choose a Topic

Start by selecting a topic that interests you and has clear cause-and-effect relationships. It could be a social issue, scientific phenomenon, historical event, or any other subject with identifiable causes and effects. 

For example, "The Effects of Climate Change on Wildlife Populations" or "Causes of Obesity in Developed Countries."

Step 2: Conduct Research

Gather relevant information and evidence to support your thesis statement . Look for credible sources such as academic journals, books, government reports, and reputable websites. 

Ensure you have a thorough understanding of both the causes and effects related to your chosen topic.

Step 4: Develop a Thesis Statement

Craft a clear and concise thesis statement that outlines the main causes and effects you will discuss in your essay. Your thesis should provide a roadmap for the reader and clearly state your position on the topic. 

For instance, "The rise in carbon emissions from human activities is leading to severe consequences for global ecosystems."

Step 5: Outline your Essay

Create a structured outline that organizes your ideas and arguments logically. Divide your essay into introduction , body paragraphs (each discussing a specific cause or effect), and conclusion . 

Each body paragraph should focus on one cause or effect and provide supporting details and evidence.

Step 6: Write the Introduction

Begin with an engaging introduction that provides background information on the topic and introduces your thesis statement. 

Hook the reader's attention with an interesting fact, statistic, or anecdote related to your topic. Clearly state the purpose of your essay and preview the main points you will discuss.

Step 7: Body Paragraphs

In the body paragraphs, explore the causes or effects of the topic in detail. Start each paragraph with a topic sentence that introduces the cause or effect you will be discussing. 

Then, provide evidence and examples to support your claim. Use data, statistics, expert opinions, and real-life examples to strengthen your arguments. Make sure to explain the causal relationship between the factors you're discussing.

Step 8: Transition Between Paragraphs

Use transition words and sentences to smoothly transition between paragraphs and maintain coherence throughout your essay. 

These transitions help guide the reader through your arguments and ensure a logical flow of ideas.

Step 9: Write the Conclusion

Summarize the main points of your essay in the conclusion and restate your thesis statement. Reflect on the significance of your findings and emphasize the importance of understanding the causes and effects of the topic. 

Avoid introducing new information in the conclusion; instead, offer insights or suggestions for further research or action.

Step 10: Revise and Edit

Review your essay for clarity, coherence, and grammatical accuracy. Make sure each paragraph contributes to the overall argument and that your ideas are well-supported by evidence.

Once you've made revisions and edits, finalize your essay by formatting it according to the guidelines provided by your instructor or publication. 

Double-check citations and references to ensure they are accurate and properly formatted according to the required citation style (e.g., APA, MLA).

Cause and Effect Essay Examples

When writing a cause and effect essay for the first time, it is recommended to go through a few examples. It will help you understand the structure and how to use a method effectively.

The following are some of the great cause and effect examples free to use.

Cause and Effect Essay

Cause and Effect Essay Sample

Climate Change Cause and Effect Essay

Poverty Cause and Effect Essay

Air Pollution Cause and Effect Essay

Cause and Effect Essay Topics

Here are some cause and effect essay topics:

• The Impact of Climate Change on Extreme Weather Events
• The Rise of Mental Health Disorders Among Adolescents
• The Effects of Social Media on Political Polarization
• The Consequences of Deforestation on Biodiversity Loss
• The Relationship Between Income Inequality and Social Mobility
• The Impact of Technology on Human Relationships
• The Causes and Effects of the Global Obesity Epidemic
• The Effects of Air Pollution on Public Health
• The Impact of Artificial Intelligence on Employment
• The Causes and Consequences of Refugee Crises

These topics reflect current societal concerns and offer opportunities for in-depth analysis of cause-and-effect relationships. If you need more such ideas check out our cause and effect essay topics  blog!

Tips for Writing a Cause and Effect Essay

Here are additional tips for writing a cause and effect essay:

• Establish Clear Connections: Clearly establish the causal relationships between different factors to help readers understand the cause-and-effect dynamics of the topic.
• Avoid Oversimplification: Recognize that most events have multiple causes and effects, so avoid oversimplifying complex phenomena by considering various factors and their interactions.
• Consider Chronology: When discussing historical events, consider the chronological sequence of causes and effects to provide a clear narrative structure.
• Focus on Significance: Highlight the significance of your findings by discussing the broader implications of the causes and effects you've identified.
• Reflect and Synthesize: In the conclusion, reflect on the insights gained from analyzing the causes and effects and synthesize your findings to provide a cohesive understanding of the topic.

To conclude, writing a cause and effect essay can be a rewarding experience that allows you to look into complex issues. By following the guidelines outlined in this guide and applying your critical thinking skills, you can create compelling essays that inform and engage your audience. 

But if you are in a time crunch do not hesitate to take professional help. CollegeEssay.org provides a top cause and effect essay writing service for those students who are having a hard time meeting deadlines. We'll help you with your cause and effects essays for the best grades. 

Reach out to avail amazing discounts and get our custom essay writing help in no time. As a plus, you can use our AI writing tool if you need a quick fix to beat the deadline stress!

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Cause & effect essays Aka reason and result

The Cause and effect essay is another common essay type, either as an essay type on its own, or as part of a larger essay which includes one or more paragraphs examining causes and effects. This page gives information on what a cause and effect essay is , how to structure this type of essay, and how to use cause and effect structure words (transition signals) for this type of essay. There is also an example cause and effect essay on the topic of women at work, as well as some exercises to help you practice this area.

What are cause & effect essays?

For another look at the same content, check out YouTube » or Youku » , or this infographic » .

A cause and effect essay looks at the reasons (or causes) for something, then discusses the results (or effects). For this reason, cause and effect essays are sometimes referred to as reason and result essays. They are one of the most common forms of organisation in academic writing. Sometimes the whole essay will be cause and effect, though sometimes this may be only part of the whole essay. It is also possible, especially for short exam essays, that only the causes or the effects, not both, are discussed. See the examples below.

• Discuss the causes and effects of global warming ['cause and effect' essay]
• Explain the high death rate in Chernobyl ['causes' only essay]
• Discuss the WTO and its effects on the Chinese economy ['effects' only essay]

There are two main ways to structure a cause and effect essay. These are similar to the ways to structure problem-solution essays , namely using a block or a chain structure. For the block structure, all of the causes are listed first, and all of the effects are listed afterwards. For the chain structure, each cause is followed immediately by the effect. Usually that effect will then be the cause of the next effect, which is why this structure is called 'chain'. Both types of structure have their merits. The former is generally clearer, especially for shorter essays, while the latter ensures that any effects you present relate directly to the causes you have given.

The two types of structure, block and chain , are shown in the diagram below.

Cause and Effect Structure Words

Cause and effect structure words are transition signals which show the cause and effect relationships. It is important to be clear which is the cause (or reason) and which is the effect (or result), and to use the correct transition word or phrase. Remember that a cause happens first , and the effect happens later .

Below are some common cause and effect structure words. X is used to indicate a cause, while Y is used to indicate the effect.

• The first cause of (Y) is (X)
• The next reason is (X)
• Because of (X), (Y)
• As a result of (X), (Y)
• As a consequence of (X), (Y)
• because/since/as (X)
• to result from (X)
• (X) results in (Y)
• to be the result of (X)
• (Y) is due to (X)
• Owing to (X), (Y)
• (Y) is because of (X)
• (Y) is the effect of (X)
• (Y) is the consequence of (X)
• Worsening pollution levels in cities are due to the increased use of cars.
• Because of the increased use of cars, pollution levels in cities are worsening.
• As a result of the increased use of cars, pollution levels in cities are worsening.
• The effect of the increased use of cars is a worsening of pollution levels in cities.
• The first effect of (X) is (Y)
• Another result of (X) is (Y)
• As a result, (Y)
• As a consequence, (Y)
• Consequently (Y)
• Therefore, (Y)
• (X) causes (Y)
• (X) has an effect on (Y)
• (X) affects (Y)
• (X) is one of the causes of (Y)
• (X) is the reason for (Y)
• Cars are used increasingly for urban transport. As a consequence , pollution levels in cities are worsening.
• Increased use of cars for urban transport adversely affects pollution levels in cities.
• Increased use of cars for urban transport is one of the causes of worsening pollution levels in cities.

Example essay

Below is a cause and effect essay. This essay uses the block structure . Click on the different areas (in the shaded boxes to the right) to highlight the different structural aspects in this essay, i.e. Causes, Effects, and structure words. This will highlight not simply the paragraphs, but also the thesis statement and summary , as these repeat the causes and effects contained in the main body.

Title: More and more women are now going out to work and some women are now the major salary earner in the family. What are the causes of this, and what effect is this having on families and society?

In the past, most women stayed at home to take care of domestic chores such as cooking or cleaning. Women's liberation and feminism have meant that this situation has been transformed and in contemporary society women are playing an almost equal role to men in terms of work. This has had significant consequences , both in terms of the family , for example by improving quality of life and increasing children's sense of independence , and also for society itself with greater gender equality . The main reasons behind the increase of women in the workplace are women's liberation and feminism. The women's liberation movement originated in the 1960s and was popularised by authors such as Simone de Beauvoir. As a consequence of this, new legislation emerged, granting women equal rights to men in many fields, in particular employment. Because of feminist ideas, men have taken up roles which were previously seen as being for women only, most importantly those related to child rearing. As a result of this, women have more time to pursue their own careers and interests. These have led to some significant effects, both to family life and to society as a whole. Although the earning capacity of a woman in her lifetime is generally much less than that of a man, she can nevertheless make a significant contribution to the family income. The most important consequence of this is an improved quality of life. By helping to maintain a steady income for the family, the pressure on the husband is considerably reduced, hence improving both the husband's and the wife's emotional wellbeing. Additionally, the purchasing power of the family will also be raised. This means that the family can afford more luxuries such as foreign travel and a family car. A further effect on the family is the promotion of independence in the children. Some might argue that having both parents working might be damaging to the children because of a lack of parental attention. However, such children have to learn to look after themselves at an earlier age, and their parents often rely on them to help with the housework. This therefore teaches them important life skills. As regards society, the most significant impact of women going to work is greater gender equality. There are an increasing number of women who are becoming politicians, lawyers, and even CEOs and company managers. This in turn has led to greater equality for women in all areas of life, not just employment. For example, women today have much stronger legal rights to protect themselves against domestic violence and sexual discrimination in the workplace. In conclusion, the increasing number of women at work has brought about some important changes to family life, including improved quality of life and increased independence for children, as well as affecting society itself. It is clear that the sexes are still a long way from being equal in all areas of life, however, and perhaps the challenge for the present century is to ensure that this takes place.

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Below is a checklist for cause and effect essays. Use it to check your own writing, or get a peer (another student) to help you.

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Compare & contrast essays examine the similarities of two or more objects, and the differences.

Cause & effect essays consider the reasons (or causes) for something, then discuss the results (or effects).

Discussion essays require you to examine both sides of a situation and to conclude by saying which side you favour.

Problem-solution essays are a sub-type of SPSE essays (Situation, Problem, Solution, Evaluation).

Transition signals are useful in achieving good cohesion and coherence in your writing.

Reporting verbs are used to link your in-text citations to the information cited.

Want to create or adapt books like this? Learn more about how Pressbooks supports open publishing practices.

10.8 Cause and Effect

Learning objectives.

• Determine the purpose and structure of cause and effect in writing.
• Understand how to write a cause-and-effect essay.

The Purpose of Cause and Effect in Writing

It is often considered human nature to ask, “why?” and “how?” We want to know how our child got sick so we can better prevent it from happening in the future, or why our colleague a pay raise because we want one as well. We want to know how much money we will save over the long term if we buy a hybrid car. These examples identify only a few of the relationships we think about in our lives, but each shows the importance of understanding cause and effect.

A cause is something that produces an event or condition; an effect is what results from an event or condition. The purpose of the cause-and-effect essay is to determine how various phenomena relate in terms of origins and results. Sometimes the connection between cause and effect is clear, but often determining the exact relationship between the two is very difficult. For example, the following effects of a cold may be easily identifiable: a sore throat, runny nose, and a cough. But determining the cause of the sickness can be far more difficult. A number of causes are possible, and to complicate matters, these possible causes could have combined to cause the sickness. That is, more than one cause may be responsible for any given effect. Therefore, cause-and-effect discussions are often complicated and frequently lead to debates and arguments.

Use the complex nature of cause and effect to your advantage. Often it is not necessary, or even possible, to find the exact cause of an event or to name the exact effect. So, when formulating a thesis, you can claim one of a number of causes or effects to be the primary, or main, cause or effect. As soon as you claim that one cause or one effect is more crucial than the others, you have developed a thesis.

Consider the causes and effects in the following thesis statements. List a cause and effect for each one on your own sheet of paper.

• The growing childhood obesity epidemic is a result of technology.
• Much of the wildlife is dying because of the oil spill.
• The town continued programs that it could no longer afford, so it went bankrupt.
• More young people became politically active as use of the Internet spread throughout society.
• While many experts believed the rise in violence was due to the poor economy, it was really due to the summer-long heat wave.

Write three cause-and-effect thesis statements of your own for each of the following five broad topics.

• Health and nutrition

The Structure of a Cause-and-Effect Essay

The cause-and-effect essay opens with a general introduction to the topic, which then leads to a thesis that states the main cause, main effect, or various causes and effects of a condition or event.

The cause-and-effect essay can be organized in one of the following two primary ways:

• Start with the cause and then talk about the effects.
• Start with the effect and then talk about the causes.

For example, if your essay were on childhood obesity, you could start by talking about the effect of childhood obesity and then discuss the cause or you could start the same essay by talking about the cause of childhood obesity and then move to the effect.

Regardless of which structure you choose, be sure to explain each element of the essay fully and completely. Explaining complex relationships requires the full use of evidence, such as scientific studies, expert testimony, statistics, and anecdotes.

Because cause-and-effect essays determine how phenomena are linked, they make frequent use of certain words and phrases that denote such linkage. See Table 10.4 “Phrases of Causation” for examples of such terms.

Table 10.4 Phrases of Causation

The conclusion should wrap up the discussion and reinforce the thesis, leaving the reader with a clear understanding of the relationship that was analyzed.

Be careful of resorting to empty speculation. In writing, speculation amounts to unsubstantiated guessing. Writers are particularly prone to such trappings in cause-and-effect arguments due to the complex nature of finding links between phenomena. Be sure to have clear evidence to support the claims that you make.

Look at some of the cause-and-effect relationships from Note 10.83 “Exercise 2” . Outline the links you listed. Outline one using a cause-then-effect structure. Outline the other using the effect-then-cause structure.

Writing a Cause-and-Effect Essay

Choose an event or condition that you think has an interesting cause-and-effect relationship. Introduce your topic in an engaging way. End your introduction with a thesis that states the main cause, the main effect, or both.

Organize your essay by starting with either the cause-then-effect structure or the effect-then-cause structure. Within each section, you should clearly explain and support the causes and effects using a full range of evidence. If you are writing about multiple causes or multiple effects, you may choose to sequence either in terms of order of importance. In other words, order the causes from least to most important (or vice versa), or order the effects from least important to most important (or vice versa).

Use the phrases of causation when trying to forge connections between various events or conditions. This will help organize your ideas and orient the reader. End your essay with a conclusion that summarizes your main points and reinforces your thesis. See Chapter 15 “Readings: Examples of Essays” to read a sample cause-and-effect essay.

Choose one of the ideas you outlined in Note 10.85 “Exercise 3” and write a full cause-and-effect essay. Be sure to include an engaging introduction, a clear thesis, strong evidence and examples, and a thoughtful conclusion.

Key Takeaways

• The purpose of the cause-and-effect essay is to determine how various phenomena are related.
• The thesis states what the writer sees as the main cause, main effect, or various causes and effects of a condition or event.

The cause-and-effect essay can be organized in one of these two primary ways:

• Start with the cause and then talk about the effect.
• Start with the effect and then talk about the cause.
• Strong evidence is particularly important in the cause-and-effect essay due to the complexity of determining connections between phenomena.
• Phrases of causation are helpful in signaling links between various elements in the essay.

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A cause and effect essay is concerned with the relationship or sequence between two or more things, events or ideas. This essay explores why something happens (the cause) and what consequences result (the effect).

Cause: The reason for an occurrence, action or event.

Effect: A result, outcome or consequence of a cause.

Example: I was bit by a mosquito and my arm really itches!

Cause: A mosquito bit me.

Effect: My arm itches.

An essay can have multiple causes and effects. Additionally, causes and effects can be sequential in nature, where one leads to another. A good example of this is dominos, where a person knocks over the first, causing all the following dominos to fall over.

It is important to be wary of speculation. Just because an event proceeds another, does not necessitate that it was the cause. Coincidences happen.

Example: Early childhood vaccinations occur during the first 18 months of a child’s life. The first signs of autism appear by 12 to 18 months of age. Most children, when first diagnosed with autism, will have recently received a vaccine. This has led many people to conclude that vaccines cause autism, though there is very little scientific evidence to support that conclusion.

A correlation, or a connection or relationship between two things, can indicate a causational relationship between two things. However, that is not always the case, like in the picture below.

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Cause and Effect Essay Outline: Types, Examples and Writing Tips

20 June, 2020

9 minutes read

Author:  Tomas White

This is a complete guide on writing cause and effect essays. Find a link to our essay sample at the end. Let's get started!

What is a Cause and Effect Essay?

A cause and effect essay is the type of paper that the author is using to analyze the causes and effects of a particular action or event. A curriculum usually includes this type of exercise to test your ability to understand the logic of certain events or actions.

If you can see the logic behind cause and effect in the world around you, you will encounter fewer problems when writing. If not, writing this kind of paper will give you the chance to improve your skillset and your brain’s ability to reason.

“Shallow men believe in luck or in circumstance. Strong men believe in cause and effect.” ― Ralph Waldo Emerson

In this article, the  Handmade Writing team will find out how to create an outline for your cause and effect essay – the key to successful essay writing.

Types of the Cause and Effect Essay

Before writing this kind of essay, you need to draft the structure. A good structure will result in a good paper, so it’s important to have a plan before you start. But remember , there’s no need to reinvent the wheel: just about every type of structure has already been formulated by someone.

If you are still unsure about the definition of an essay, you can take a look at our guide:  What is an Essay?

Generally speaking, there are three types of cause and effect essays. We usually differentiate them by the number of and relationships between the different causes and the effects. Let’s take a quick look at these three different cases:

1. Many causes, one effect

This kind of essay illustrates how different causes can lead to one effect. The idea here is to try and examine a variety of causes, preferably ones that come from different fields, and prove how they contributed to a particular effect. If you are writing about World War I, for example, mention the political, cultural, and historical factors that led to the great war.

By examining a range of fundamental causes, you will be able to demonstrate your knowledge about the topic.

Here is how to structure this type of essay:

• Introduction
• Cause #3 (and so on…)
• The effect of the causes

2. One cause, many effects

This type of cause and effect essay is constructed to show the various effects of a particular event, problem, or decision. Once again, you will have to demonstrate your comprehensive knowledge and analytical mastery of the field. There is no need to persuade the reader or present your argument . When writing this kind of essay, in-depth knowledge of the problem or event’s roots will be of great benefit. If you know why it happened, it will be much easier to write about its effects.

Here is the structure for this kind of essay:

• Effect #3 (and so on…)

3. Chain of causes and effects

This is the most challenging type. You need to maintain a chain of logic that demonstrates a sequence of actions and consequences, leading to the end of the chain. Although this is usually the most interesting kind of cause and effect essay, it can also be the most difficult to write.

Here is the outline structure:

• Effect #1 = Cause #2
• Effect #2 = Cause #3
• Effect #3 = Cause #4 (and so on…)

Cause and Effect Essay Outline Example

Let’s take a look at an example. Below, you will find an outline for the topic “The causes of obesity” (Type 1) :

As you can see, we used a blended strategy here. When writing about the ever-increasing consumption of unhealthy food, it is logical to talk about the marketing strategies that encourage people to buy fast food. If you are discussing fitness trainers, it is important to mention that people need to be checked by a doctor more often, etc.

In case you face some issues with writing your Cause and Effect essay, you can always count on our Essay Writers !

How do I start writing once I have drafted the structure?

If you start by structuring each paragraph and collecting suitable examples, the writing process will be much simpler. The final essay might not come up as a classic five paragraph essay – it all depends on the cause-effect chain and the number of statements of your essay.

In the Introduction, try to give the reader a general idea of what the cause and effect essay will contain. For an experienced reader, a thesis statement will be an indication that you know what you are writing about. It is also important to emphasize how and why this problem is relevant to modern life. If you ever need to write about the Caribbean crisis, for instance, state that the effects of the Cold War are still apparent in contemporary global politics. 

Related Post: How to write an Essay introduction | How to write a Thesis statement

In the Body, provide plenty of details about what causes led to the effects. Once again, if you have already assembled all the causes and effects with their relevant examples when writing your plan, you shouldn’t have any problems. But, there are some things to which you must pay particular attention. To begin with, try to make each paragraph the same length: it looks better visually. Then, try to avoid weak or unconvincing causes. This is a common mistake, and the reader will quickly realize that you are just trying to write enough characters to reach the required word count.

Moreover, you need to make sure that your causes are actually linked to their effects. This is particularly important when you write a “chained” cause and effect essay (type 3) . You need to be able to demonstrate that each cause was actually relevant to the final result. As I mentioned before, writing the Body without preparing a thorough and logical outline is often an omission.

The Conclusion must be a summary of the thesis statement that you proposed in the Introduction. An effective Conclusion means that you have a well-developed understanding of the subject. Notably, writing the Conclusion can be one of the most challenging parts of this kind of project. You typically write the Conclusion once you have finished the Body, but in practice, you will sometimes find that a well-written conclusion will reveal a few mistakes of logic in the body!

Cause and Effect Essay Sample

Be sure to check the sample essay, completed by our writers. Use it as an example to write your own cause and effect essay. Link: Cause and effect essay sample: Advertising ethic issues .

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Cause And Effect Essay Guide

Cause And Effect Essay Examples

Best Cause and Effect Essay Examples To Get Inspiration + Simple Tips

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How To Write A Cause and Effect Essay - Outline & Examples

230+ Cause and Effect Essay Topics to Boost Your Academic Writing

How to Create a Cause and Effect Outline - An Easy Guide

You need to write a cause and effect essay for your assignment. Well, where should you start?

Establishing a relationship between causes and effects is no simple task. You need to ensure logical connections between variables with credible evidence.

However, don't get overwhelmed by the sound of it. You can start by reading some great cause and effect essay examples. 

In this blog, you can read cause and effect essays to get inspiration and learn how to write them. With these resources, you'll be able to start writing an awesome cause and effect paper.

Let’s dive in!

• 1. What is a Cause and Effect Essay?
• 2. Cause and Effect Essay Examples for Students
• 3. Free Cause and Effect Essay Samples
• 4. Cause and Effect Essay Topics
• 5. Tips For Writing a Good Cause and Effect Essay

What is a Cause and Effect Essay?

A cause and effect essay explores why things happen (causes) and what happens as a result (effects). This type of essay aims to uncover the connections between events, actions, or phenomena. It helps readers understand the reasons behind certain outcomes.

In a cause and effect essay, you typically:

• Identify the Cause: Explain the event or action that initiates a chain of events. This is the "cause."
• Discuss the Effect: Describe the consequences or outcomes resulting from the cause.
• Analyze the Relationship: Clarify how the cause leads to the effect, showing the cause-and-effect link.

Cause and effect essays are common in various academic disciplines. For instance, studies in sciences, history, and the social sciences rely on essential cause and effect questions. For instance, "what are the effects of climate change?", or "what are the causes of poverty?"

Now that you know what a cause and effect is, let’s read some examples.

Cause and Effect Essay Examples for Students

Here is an example of a well-written cause and effect essay on social media. Let’s analyze it in parts to learn why it is good and how you can write an effective essay yourself. 

The essay begins with a compelling hook that grabs the reader's attention. It presents a brief overview of the topic clearly and concisely. The introduction covers the issue and ends with a strong thesis statement , stating the essay's main argument – that excessive use of social media can negatively impact mental health.

The first body paragraph sets the stage by discussing the first cause - excessive social media use. It provides data and statistics to support the claim, which makes the argument more compelling. The analysis highlights the addictive nature of social media and its impact on users. This clear and evidence-based explanation prepares the reader for the cause-and-effect relationship to be discussed.

The second body paragraph effectively explores the effect of excessive social media use, which is increased anxiety and depression. It provides a clear cause-and-effect relationship, with studies backing the claims. The paragraph is well-structured and uses relatable examples, making the argument more persuasive. 

The third body paragraph effectively introduces the second cause, which is social comparison and FOMO. It explains the concept clearly and provides relatable examples. It points out the relevance of this cause in the context of social media's impact on mental health, preparing the reader for the subsequent effect to be discussed.

The fourth body paragraph effectively explores the second effect of social comparison and FOMO, which is isolation and decreased self-esteem. It provides real-world consequences and uses relatable examples. 

The conclusion effectively summarizes the key points discussed in the essay. It restates the thesis statement and offers practical solutions, demonstrating a well-rounded understanding of the topic. The analysis emphasizes the significance of the conclusion in leaving the reader with a call to action or reflection on the essay's central theme.

This essay follows this clear cause and effect essay structure to convey the message effectively:

Read our cause and effect essay outline blog to learn more about how to structure your cause and effect essay effectively.

Free Cause and Effect Essay Samples

The analysis of the essay above is a good start to understanding how the paragraphs in a cause and effect essay are structured. You can read and analyze more examples below to improve your understanding.

Cause and Effect Essay Elementary School

Cause and Effect Essay For College Students

Short Cause and Effect Essay Sample

Cause and Effect Essay Example for High School

Cause And Effect Essay IELTS

Bullying Cause and Effect Essay Example

Cause and Effect Essay Smoking

Cause and Effect Essay Topics

Wondering which topic to write your essay on? Here is a list of cause and effect essay topic ideas to help you out.

• The Effects of Social Media on Real Social Networks
• The Causes And Effects of Cyberbullying
• The Causes And Effects of Global Warming
• The Causes And Effects of WW2
• The Causes And Effects of Racism
• The Causes And Effects of Homelessness
• The Causes and Effects of Parental Divorce on Children.
• The Causes and Effects of Drug Addiction
• The Impact of Technology on Education
• The Causes and Consequences of Income Inequality

Need more topics? Check out our list of 150+ cause and effect essay topics to get more interesting ideas.

Tips For Writing a Good Cause and Effect Essay

Reading and following the examples above can help you write a good essay. However, you can make your essay even better by following these tips.

• Choose a Clear and Manageable Topic: Select a topic that you can explore thoroughly within the essay's word limit. A narrowly defined topic will make it easier to establish cause-and-effect relationships.
• Research and Gather Evidence: Gather relevant data, statistics, examples, and expert opinions to support your arguments. Strong evidence enhances the credibility of your essay.
• Outline Your Essay: Create a structured outline that outlines the introduction, body paragraphs, and conclusion. This will provide a clear roadmap for your essay and help you present causes and effects clearly and coherently.
• Transitional Phrases: Use transitional words and phrases like "because," "due to," "as a result," "consequently," and "therefore" to connect causes and effects within your sentences and paragraphs.
• Support Each Point: Dedicate a separate paragraph to each cause and effect. Provide in-depth explanations, examples, and evidence for each point.
• Proofread and Edit: After completing the initial draft, carefully proofread your essay for grammar, punctuation, and spelling errors. Additionally, review the content for clarity, coherence, and flow.
• Peer Review: Seek feedback from a peer or someone familiar with the topic to gain an outside perspective. They can help identify any areas that need improvement.
• Stay Focused: Avoid going off-topic or including irrelevant information. Stick to the causes and effects you've outlined in your thesis statement.
• Revise as Needed: Don't hesitate to make revisions and improvements as needed. The process of revising and refining your essay is essential for producing a high-quality final product. 

To Sum Up , 

Cause and effect essays are important for comprehending the intricate relationships that shape our world. With the help of the examples and tips above, you can confidently get started on your essay. 

If you still need further help, you can hire a professional writer to help you out. At MyPerfectWords.com , we’ve got experienced and qualified essay writers who can help you write an excellent essay on any topic and for all academic levels.

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Cause And Effect Essay Writing

Cause And Effect Essay

Last updated on: Feb 9, 2023

A Guide to Cause and Effect Essay | Samples + Topics

By: Leanne R.

11 min read

Reviewed By: Jacklyn H.

Published on: Jun 9, 2020

A cause and effect essay is another type of expository essay explaining why one thing happens and how it affects the other.

Cause and effect essay writing is based on how an event or thing affects another event. Such essays explain this cause and effect relationship between different things and inform the readers about it.

These effects could both be short and long term.

This blog will make you understand how to write a cause and effect essay step by step and will also provide samples to help you.

On this Page

What is a Cause and Effect Essay?

In this world, everything is inherently interconnected.

The rain makes the soil wet, and the plants grow. In the domino effect, when one domino is toppled, it hits the next, and then the next, and so forth, etc.

To understand the question of what does cause and effect mean, this essay will explore the ‘why’ and ‘how’ of a situation.

Cause and effect essay definition states that such an essay serves to illustrate why certain things occur or situations arise. It also examines the consequences of those events, actions or phenomena.

School students and college students equally struggle with writing correctly structured essays that depict precise and factual information.

If you are a high school or college student; chances are that you will have to write this type of essay.

Staying on this website will equip you with the skills to analyze the events and deliver an impactful cause and effect essay.

The theme of this essay type revolves around the causes and multiple effects of certain issues, problems or situations.

Types of Cause and Effect Essay

At a basic level, these essays are of three types.

1. Effect-Focused Method

The analysis is focused on one or multiple effects that the occurrence of an event has had.

2. Cause-Focused Method

The analysis is focused on the different causes that lead to the event.

3. Causes and Effects-Focused Method

The analysis is focused on both the causes and the effects. The reason why something happened and the impacts it had.

The major aim of these essays is to develop student’s skills in analyzing the events in depth.

These essays test the ability of students to present analytical and problem-solving skills involving various topics that impact our lives and our societies.

Effective topics may revolve around the following subject matters: social, political, medical, environmental and food-related issues. Cause and effect essay topic for college is mostly based on these subjects.

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Cause and Effect Essay Structure

There are 2 main structures of writing a cause and effect essay. You need to choose one before starting your essay.

1. Block structure

In a block structure essay, you will first write all the causes and then all the effects of your topic.

In block structure, there can be an effect-focused essay or a cause-focused essay.

Here is a visual representation of a block structure for your essay

2. Chain Structure

In the chain structure, you have to write a cause followed by its effect. Every cause should be followed by its possible effect. This is what your essay will look like if you follow the chain structure.

Some of the effective essay topics can be written efficiently by following the block structure. While some others fit into the chain structure.

It all depends on the choice and expertise of the students to present their points in an effective and convincing manner.

Cause and Effect Essay Outline

Before moving towards writing an essay, drafting an outline is quite important. It is essential in the case of writing a cause and effect essay because students have to consider the causes and effects of some issue or situation, without missing anything.

An essay outline provides the chance of following a specific guideline to ensure all the instructions are followed efficiently.

In order to write a  cause and effect essay outline , you can follow this simple structure.

How to Write a Cause and Effect Essay?

Writing based on personal beliefs and opinions shatters the whole purpose of such essays. You can’t make a logical argument regarding the cause and effects of a particular situation or action.

You therefore need sound reasoning and authentic examples to prove your point.

Staying on this website will allow you the opportunity of learning the tips to create impactful content.

1. Choose an Engaging and Significant Essay Topic

Selecting a topic is the easiest but trickiest part.

Students often get confused when it comes to how to write a cause and effect essay. Because they choose a topic for a cause and effect essay, which sets them for failure.

If you plan to choose the title “My Visit to my Grandparents’ House” and think it is correct as you will write the effects of your visit in the essay, then you are wrong!

Your topic should be based on logic and you should create a connection between the events.

For instance, if you choose the title “Effect of grandparents on my personality”, then this is an effective topic.

Cause and effects of the second world war on the United States or anorexia nervosa are also perfect effect essay topics.

Looking for more topics for your cause and effect essay?

Feel free to explore these cause and effect essay topics and pick any topic of your choice.

2. Start Your Research

After topic selection, move to the research section.

First tip: don’t go straight to the paper and start writing your first draft. Take a deep breath and analyze all aspects of the topic.

Ask questions! Why? What? How? When?

• Why is it happening?
• How is it happening?
• How did it start?
• What caused it?
• How will it influence the future?
• How is it influencing at the moment?

Look at the present state of the topic. Inspect the previous stages and analyze future effects!

The more you research the more familiar you will become with the topic at hand. And it will help understand different aspects of your topic, giving you better ideas to write.

Along with reading different journals, scholarly articles, books for information, another helpful source is cause and effect essay samples. Go through different samples written by other students, this will not only give you insight about your topic, but will also help understand the essay structure better.

3. Craft a Thesis Statement

Once you have decided on your topic and gathered relevant information, the next step is to craft a thesis. The thesis statement of your essay will inform the reader why you chose the particular topic, its importance and the purpose of the paper.

Keep in mind that your thesis shouldn’t be personal. Consider the feelings of your audience and they should also be able to resonate with it. Give reasons as to why you care about a particular issue, that others will understand as well.

Go check out this article for a better understanding of writing a thesis statement

4. Write a Rough Draft

Don’t rush to put words down on paper.

Collect your thoughts and write down all the ideas and important points on paper. Your rough draft can be based only on these key points.

Don’t worry about making it perfect at this stage. Just jot down your thoughts, assemble them and perfect it later.

To write an effective essay, a structured outline should be followed. Once you are done writing, it is essential to polish your final draft.

5. Write a Cause and Effect Essay Introduction

You must have heard the phrase “the first impression is the last impression.” Similarly, the impression that your essay introduction leaves on the reader decides whether they will read further or not.

To make sure that the reader is impressed by your opening lines and is intrigued to learn more, use an attention grabber – hook.

A hook sentence acts as a tool to attract the reader’s attention, motivating them to read further. There are different types of hook sentences that you can use depending on your topic. Learn more about them from our blog on hook examples.

The next step is making your audience/reader familiar with the essay topic. Begin with a general introduction to the topic followed by the thesis statement. Understand the difference between cause and effect before you start writing. Give a general idea of your topic in the first paragraph.

The most important part of the introduction is the thesis statement. A thesis statement is the foundation of your essay and informs the reader of the purpose of writing the essay. Relate your topic to the current situation and its importance.

6. Compose and Arrange the Body Paragraphs

It is important to provide plenty of details you have collected on your topic regarding the causes and effects of your topic.

Assemble all the data with relevant examples to create credibility in your academic writing. The cause and effect essay should be based entirely on facts.

Link the causes to the effects using transitional words in your body paragraphs.

Successfully linking causes and effects depends on the approach you are following for your essay.

You may use either one of the structures mentioned above to present the causes and effects of your topic.

7. End with a Powerful Conclusion

Restate the thesis statement that you proposed in the introductory paragraph in the last paragraph. A well-written and precise conclusion gives closure to the entire argument and context of the essay.

Cause and effect essays are easy to write, just stay focused and try to create impact through your words and use of evidence.

• Use purpose-specific vocabulary.
• Use transitional words.
• State ideas chronologically.
• Never overlap ideas.

Doing so will create chaos in your essay and the reader won’t be able to understand the information stated in the paragraphs.

When writing the body section, dedicate each paragraph to separate the ideas.

Every paragraph should have a separate topic sentence that clearly defines its purpose. Now you can start your essay writing .

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Cause and Effect Essay Examples

Following are a few cause and effect essay samples which will help you explore cause and effect essay prompts.

CAUSE AND EFFECT ESSAY SAMPLE

CAUSE AND EFFECT ESSAY EXAMPLE

CAUSE AND EFFECT ESSAY ON DIVORCE

Cause and Effect Essay Topics

Here are some good cause and effect essay topics:

• Results of financial independence in a romantic relationship.
• How does social anxiety impact teenagers?
• How does acne affect someone’s confidence?
• Reasons for sibling rivalry and its effects.
• Reasons why teenagers rebel.
• Causes of job dissatisfaction.
• Forced marriages and their results.
• Causes of domestic violence.
• What are the causes for men’s commitment phobia?
• Cramming doesn’t help score better.
• People from a broken family have unhappier marriages.
• Effects of social media on teenagers.

Essay writing process is easy and you are definitely equipped with all the talent and skills required to write an essay.

We understand that sometimes time is not on your side and you go through severe writer’s block. That is why students tend to seek professional help from an essay writing service.

Here at 5StarEssays.com , we provide you with 24/7 support and excellent quality at a reasonable price.

Whether it is a cause and effect essay or any other academic paper our qualified essay writers are always available to provide you with quality “ make my essay ” services.

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Frequently Asked Questions

What is the main purpose of a cause and effect essay.

Cause and effect papers use strong analytical skills to examine the reasons for or outcomes of an event. These are often written as a way in which someone could potentially discover how something happened.

Such as why one particular decision led them down their current path-or if there were any other factors involved that caused the said outcome

Why is it important to know cause and effect?

Knowledge is power. Understanding how a single event can result in multiple effects, and then pinpointing that one cause for each of those results will help the students develop into analytical thinkers with the ability to work on their own.

What is the importance of cause and effect in our daily lives?

A person who can think about the interconnected causes and effects of social events will be more successful in their day-to-day life. It's no surprise, then, that if you have this skill set your chances for success with solving real-world problems are much greater!

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How to Write a Cause and Effect Essay: Full Guide

Ever wondered how things are connected in our world? Think of the butterfly effect—where a butterfly's wings in Brazil can set off a tornado in Texas. It's a quirky idea, but it shows how events are intertwined. Writing a cause and effect essay is like unraveling these connections, connecting the dots to reveal how things influence each other and shape our experiences.

In this guide, experts from our paper writing service will explore the concept of causality and share practical tips for creating great cause and effect essays. These essays won't just provide information—they'll leave a lasting impression on your readers.

What Is a Cause and Effect Essay

A cause and effect essay is a form of writing that aims to explore and explain the relationships between different events, actions, or circumstances. The central idea is to investigate why certain things happen (causes) and what results from those occurrences (effects). It's like peeling back the layers to reveal the interconnectedness of events, understanding the domino effect in the narrative of life.

Here's a breakdown of the key components:

• Causes: These are the factors or events that initiate a particular situation. They are the reasons behind why something occurs. For instance, if you're exploring the cause of obesity, factors like unhealthy eating habits and lack of physical activity could be identified as causes.
• Effects: The effects are the outcomes or consequences that result from the identified causes. Following the obesity example, effects could include health issues, reduced quality of life, or increased healthcare costs.
• Connection: The heart of a cause and effect essay lies in demonstrating the link between causes and effects. It's not just about listing events but explaining how one event leads to another in a logical and coherent manner.

When crafting such an essay, you're essentially acting as a storyteller and investigator rolled into one. Your goal is to guide the reader through the web of interconnected events, providing insights into the 'why' and 'what happens next.'

How to Write a Cause and Effect Essay with Easy Steps

Understanding how to write a cause and effect essay is like putting together a puzzle. Here are ten simple steps to help you write an engaging essay that looks into how things are connected.

1. Select a Specific Topic

• Choose a cause and effect relationship that sparks your interest.
• Ensure your topic is focused and manageable for a thorough exploration.

2. Explore Causal Links

• Conduct thorough research to uncover hidden connections and supporting evidence.
• Look beyond the obvious to identify intricate relationships between causes and effects.

3. Craft a Clear Thesis Statement

• Develop a precise thesis that clearly articulates the main cause and the resulting effects.
• Your thesis serves as the roadmap for your essay, guiding readers through your analysis.

4. Organize Chronologically or by Significance

• Structure your essay in a logical order, either chronologically or by the significance of events.
• This organization enhances clarity and helps readers follow the cause-and-effect progression.

5. Utilize Transitional Phrases

• Employ transition words and phrases to ensure seamless flow between causes and effects.
• Clear transitions enhance readability and strengthen the coherence of your essay.

6. Support Arguments with Credible Evidence

• Back up your claims with relevant data, examples, and statistics.
• Strong evidence adds credibility to your analysis and reinforces the cause-and-effect relationships you present.

7. Illustrate Chain Reactions

• Show how a single cause can trigger a chain of effects, and vice versa.
• Illustrate the ripple effects to emphasize the complexity of the relationships.

8. Analyze Root Causes

• Move beyond surface-level explanations and explore the underlying factors contributing to the cause-and-effect scenario.
• Deep analysis adds depth and nuance to your essay.

9. Consider Alternative Causes

• Address potential counterarguments to showcase a comprehensive understanding.
• Acknowledging alternative causes strengthens your essay's overall credibility.

10. Conclude with Impact

• Summarize key points and emphasize the broader significance of your analysis.
• Leave your readers with a thought-provoking conclusion that ties together the cause-and-effect relationships explored in your essay.

Cause and Effect Essay Structure Types

When setting up your essay, you can choose from different structures to make it organized. Let's look at two common types of cause and effect essay structures:

• Block Structure:

The block structure is a clear and organized way to present causes and effects in your essay. Here, you dedicate one section to discussing all the causes, covering multiple causes within each category. After that, you have another section to explore all the effects. This separation makes your ideas easy to understand.

Using the block structure allows you to dive deep into each category, thoroughly looking at causes and effects separately. It's handy when you want to give a detailed analysis and show the importance of each part of the causal relationship. This way, readers can fully grasp each element before moving on.

• Chain Structure:

On the other hand, the chain structure focuses on how events are connected and create ripple effects. It highlights how one cause leads to a specific effect, and that effect becomes the cause of more effects in an ongoing chain. This method is potent for illustrating the complexity of causal relationships.

The chain structure works well when you want to emphasize the sequence of events or deal with intricate cause-and-effect scenarios. It allows you to show how actions trigger a series of reactions, displaying the domino effect that leads to a specific outcome.

Regardless of the structural style you choose, if you require assistance with your academic paper, reach out to us with your ' write my paper for me ' request. Our experienced team is ready to tailor your paper to your specific requirements and ensure its excellence.

Cause and Effect Essay Outline

Creating an effective cause and effect essay begins with a well-structured outline. This roadmap helps you organize your thoughts, maintain a logical flow, and ensure that your essay effectively conveys the causal relationships between events. Below, we'll outline the key components of the essay along with examples:

I. Introduction

• Hook: Start with an engaging statement or fact. Example: 'Did you know that stress can significantly impact your overall health?'
• Background Information: Provide context for your topic. Example: 'In today's fast-paced world, stress has become an increasingly prevalent issue.'
• Thesis Statement: Clearly state the main cause and its corresponding effects. Example: 'This essay will explore the causes of stress and their profound negative effects on physical and mental health.'

II. Body Paragraphs

• Topic Sentence: Introduce the first cause you'll discuss. Example: 'One major cause of stress is heavy workload.'
• Supporting Details: Provide evidence and examples to support the cause. Example: 'For instance, individuals juggling multiple job responsibilities and tight deadlines often experience heightened stress levels.'
• Transition: Link to the next cause or move on to the effects.
• Topic Sentence: Introduce the first effect. Example: 'The effects of chronic stress on physical health can be devastating.'
• Supporting Details: Present data or examples illustrating the impact. Example: 'Studies have shown that prolonged stress can lead to cardiovascular problems, including hypertension and heart disease.'
• Transition: Connect to the next effect or cause.

C. Causes (Continued)

• Topic Sentence: Introduce the next cause in a new cause and effect paragraph. Example: 'Another significant cause of stress is financial strain.'
• Supporting Details: Explain how this cause manifests and its implications. Example: 'Financial instability often results in anxiety, as individuals worry about bills, debts, and their financial future.'
• Transition: Prepare to discuss the corresponding effects.

D. Effects (Continued)

• Topic Sentence: Discuss the effects related to financial strain. Example: 'The psychological effects of financial stress can be profound.'
• Supporting Details: Offer real-life examples or psychological insights. Example: 'Depression and anxiety are common consequences of constant financial worries, affecting both mental well-being and daily life.'

III. Conclusion

• Restate Thesis: Summarize the main cause and effects. Example: 'In summary, the heavy workload and financial strain can lead to stress, impacting both physical and mental health.'
• Closing Thoughts: Reflect on the broader significance of your analysis. Example: 'Understanding these causal relationships emphasizes the importance of stress management and financial planning in maintaining a balanced and healthy life.'

Cause and Effect Essay Examples

To help you grasp cause and effect essay writing with clarity, we have prepared two distinct essay examples that will guide you through the intricacies of both block and chain structures. Additionally, should you ever find yourself requiring assistance with academic writing or descriptive essays examples , simply send us your ' write my research paper ' request. Our expert writers are here to provide the support you need!

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Cause and Effect Essay Topics

Choosing a good topic starts with recognizing cause and effect key words. Here are 10 interesting topics that let you dig into fascinating connections and their important consequences:

• The Relationship Between Lack of Exercise and Mental Health in Older Adults
• Effects of Sleep Deprivation on Workplace Productivity
• The Impact of Cyberbullying on Adolescents' Emotional Well-being
• Influence of Social Media Advertising on Consumer Purchasing Decisions
• Consequences of Oil Spills on Coastal Ecosystems
• How Noise Pollution Affects Concentration and Academic Performance in Schools
• The Connection Between Fast-Food Marketing and Childhood Obesity
• Effects of Urbanization on Water Quality in Local Rivers
• The Relationship Between Indoor Plants and Air Quality in Homes
• Impact of Plastic Pollution on Wildlife in Urban Environments
• The Effect of Meditation on Stress Reduction in College Students
• How Increased Screen Time Affects Teenagers' Attention Span
• The Impact of Single-Use Plastics on Marine Microorganisms
• The Relationship Between Smartphone Use and Sleep Quality in Adults
• Effects of High-Fructose Corn Syrup on Metabolic Health
• The Consequences of Deforestation on Local Biodiversity
• Influence of Social Media Comparison on Body Dissatisfaction in Adolescents
• The Connection Between Air Pollution and Respiratory Health in Urban Areas
• Effects of Excessive Gaming on Academic Performance in High School Students
• The Impact of Fast Food Consumption on Childhood Obesity Rates

Final Words

Knowing what a cause and effect essay is and how to write it helps you uncover connections in different topics. With this guide, you can share your ideas in a clear and impactful way.

Meanwhile, if you're in need of a reaction paper example , rest assured we have you covered as well. So, seize this opportunity, put your thoughts on paper logically, and witness your essays leaving a lasting and influential mark.

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is a seasoned educational writer focusing on scholarship guidance, research papers, and various forms of academic essays including reflective and narrative essays. His expertise also extends to detailed case studies. A scholar with a background in English Literature and Education, Daniel’s work on EssayPro blog aims to support students in achieving academic excellence and securing scholarships. His hobbies include reading classic literature and participating in academic forums.

is an expert in nursing and healthcare, with a strong background in history, law, and literature. Holding advanced degrees in nursing and public health, his analytical approach and comprehensive knowledge help students navigate complex topics. On EssayPro blog, Adam provides insightful articles on everything from historical analysis to the intricacies of healthcare policies. In his downtime, he enjoys historical documentaries and volunteering at local clinics.

How to Write a Cause and Effect Essay

Published September 27, 2020. Updated May 19, 2022.

Cause and Effect Essay Definition

A cause and effect essay explains why events happen (causes), what results (effects), and the relationship between the cause and effect(s).

Overview of a Cause and Effect Essay

Cause and effect essays are commonly structured in four ways: causal chain, causes, effects, and causes and effects. Once you decide on a structure, you should choose your topic. You may already have some causes and/or effects in mind. Brainstorm to come up with ideas. Brainstorming helps you think more about your topic and gives you a good selection of causes and effects to choose from. Choose what causes and effects to focus on. Develop a discussion of the causes and effects to build a case for the plausibility of these causes and effects and their relationship.

Worried about your writing? Submit your paper for a Chegg Writing essay check , or for an Expert Check proofreading . Both can help you find and fix potential writing issues.

Step 1: Choose a Focus

Cause and effect essays are commonly structured in four ways:

• Causal chain
• Causes & effects

Start by considering the length of your essay and other requirements. Follow the focus and topic assigned by your instructor. Otherwise, choose the option that is best for you.

Causal Chain

A causal chain follows a specific sequence of causes and effects. It starts with an initial topic and then moves forward, identifying a specific effect of this topic. This effect, then, causes another effect, and so on down the chain.

Topic → leads to A → leads to B → leads to C → final effect

A causal chain is a good structure if you want to build up to a certain key effect of the topic and show the reader the steps it takes to get there.

The causal chain structure works well for either a short (2-3 pages) or a long (4+ pages) essay, depending on how many steps you need to discuss to reach the final effect.

When you focus on causes, start with a topic you’re interested in and think about what caused it? In a way, you’re looking backward to understand the factors that caused something or that keep it happening.

Causes → Topic

This is good for a short essay because the scope is limited to focusing on causes.

If you focus on effects, start with a topic and work forward by asking what happens due to this event or topic? What are its effects?

Topic → Effects

Effects may be in the future. For example, if a certain law is passed, what will be the most likely outcome? We can’t know for sure until it happens, but we can use existing factors and logical reasoning to make a case for certain possibilities.

You could also focus on effects that are occurring or that have occurred. For example, what effects do video games have on a certain age group? This might also allow you to focus your analysis on an existing debate. In this example, the nature of the effects of video games on children is a common topic of debate.

This is good for a short essay because what you are covering is limited to effects.

Causes and Effects

With this focus, you’d consider what makes something happen and what its effects are.

Causes → Topic → Effects

If you are writing a longer essay, you could consider discussing both causes and effects. This wider scope could result in a more thorough examination of the topic. But make sure not to set yourself up to do too much. You don’t have to touch on every cause and effect you brainstorm. Rather, your focus should relate to your purpose. Remembering your focus allows you to screen out the causes and effects that aren’t relevant to your purpose.

The cause and effect structure is good for a longer essay (4 or more pages) because you’ll have to cover more material.

Step 2: Choose a Topic

Now that you’ve decided on a focus, what do you want to write about? Your assignment prompt might give you some direction, but if the essay is open-topic, consider what you’d be interested in writing about. Here are some ideas to help you choose:

Consider Your Purpose

You want to have an end goal, a purpose. You’re discussing causes and effects, but why? To show people what? To convince people of what? For example, you could analyze effects for the purpose of showing that video games help teenagers develop good teamwork and decision-making skills.

At first, you might think about what you want to learn or explore. Maybe you’ve found that jobs in a career field you’re interested in are increasing or decreasing, and you’d like to explore the causes for that. Maybe you’d like to explore the effects of companies allowing employees to work from home. If your research leads you to conclude that these effects are mostly positive, you might focus your purpose on convincing employers to offer more work-from-home flexibility. To do that, you’d analyze the effects.

Consider Your Audience

Consider your audience can help you focus your topic and develop content. What are the relevant characteristics of your audience? What are their likely questions, concerns, or biases? Answering these questions helps you decide what to focus on. If your audience is owners or leaders of a struggling business, you could analyze the causes of their poor sales to help them improve. This example shows the connection between audience and purpose.

A phenomenon is something noteworthy or special that stands out. The topic could be from pop culture, science, current events, or anything else. You could make an argument for the causes of a movie’s popularity or explore why a particular age group favors a certain social media platform. Topics are everywhere!

Trend , as used here, doesn’t mean a fad, but rather, something that rises or falls in popularity over time.

If you write on a trend, decide the beginning and end of the period you will be discussing. For instance, the rise of women in the workforce starting from WWII makes sense because with men fighting in the war, women had to step into several key industries normally dominated by men. However, if you tried to discuss significant causes of the increase of women in the workforce from WWII to the present, you’d probably find that to be too long of a period of time to discuss thoroughly.

Step 3: Brainstorm Causes and Effects

You may already have some causes and effects in mind. Keep brainstorming to come up with more. You won’t write about everything, but brainstorming helps you think more about your topic and gives you a good selection of causes and effects to choose from.

As you brainstorm, consider different types of causes and effects.

Surface Causes and Effects

Surface causes and effects are obvious. They come immediately to mind, and their connection to the topic is clear or well-known. For example, the connection between smoking and lung damage.  Because of this, surface causes and effects usually don’t need extensive development. While they could have a role in your essay, you wouldn’t want to focus solely on obvious causes and effects.

Below-the-Surface Causes and Effects

These are not immediately obvious. This doesn’t mean they’re baseless “conspiracy theory” ideas, but that they’re not things people would immediately know or think of. They might be more complicated or even rarely acknowledged on a conscious level. These might not even occur to you until you’ve done more research and thought more about the topic. Below-the-surface causes and effects take more work to develop in an essay, but they are generally more intriguing.

Immediate Causes and Effects

Immediate causes and effects happen right before or after the topic. Because of this proximity, they are often more obvious, although they are not necessarily simple.

Remote or Background Causes and Effects

These happen well before or after the topic. You’ll have to think about the length of time that makes sense for your topic. If you are considering the increase of women in the workforce, considering WWII probably makes sense, even though it was over seventy years ago. However, if you are speculating about the causes of the popularity of Facebook, seventy years in the past is too far.

Perpetuating Causes

Perpetuating causes not only make something happen but also keep it going as well. Such causes perpetuate the topic.

Step 4: Choose What Causes and Effects to Focus On

Use these ideas to help you decide what causes and effects to focus on:

• Does your prompt tell you how many causes and effects to cover? Make sure to follow assignment instructions.
• Choose causes and effects that help you accomplish your purpose.
• Choose causes and effects relevant to your audience.
• You might notice that certain causes/effects cluster around a particular idea or theme. You could choose to focus on that theme.
• What types of causes and effects did you brainstorm? It will take more effort and writing space to develop an argument for the plausibility of a below-the-surface cause than a surface cause. Don’t take on more complicated causes and effects than you can develop in your page range.
• Don’t go the route of using lots of obvious causes and effects. These won’t give you the chance to develop an in-depth analysis and your paper might end up more like a list.

Before you turn in that paper, don’t forget to cite your sources in APA format , MLA format , or a style of your choice.

Step 5: Develop a Discussion of Your Causes and Effects

You are looking for connections between the causes and the effects of the topic. You’re building a case for the plausibility of these causes and effects.

Have a working thesis in mind. You’ll probably refine it as you go.

Make sure to avoid the false causality logical fallacy . This can also be expressed as “coincidence doesn’t equal causation.” That one event precedes another does not make the first event a cause of another. It’s up to you as the writer to establish a firm causal link.

Think about the order in which you present the causes and effects. There might be some that form a foundation for understanding others. There might also be a chronological sequence, especially if you are following a causal chain. You might also choose to develop your most compelling cause or effect.

Example Cause and Effect Essay on the Internet’s Influence on Young Adults

By Ericka Scott Nelson. Ericka earned a MA in English from the University of California, Riverside. She teaches composition at a community college.

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137 Intriguing Cause & Effect Essay Topics for Students

Teach critical thinking, logic, and the art of persuasion.

Cause-and-effect essays aren’t just a way to help students strengthen their writing skills. They’ll also learn critical thinking, logic, and the art of persuasion. In addition, they teach students to demonstrate how one thing directly influences another. Coming up with engaging cause-and-effect essay topics can be challenging, but we have you covered. This list of ideas includes a variety of topics that range from social and cultural movements to mental health and the environment.

Science and Environment Cause & Effect Essay Topics

• Describe the effect of urbanization on the environment.
• What is the impact of air pollution on health?
• What are the causes and consequences of plastics on marine life?
• What is the impact of rising sea temperatures on fish and marine life?
• Describe the impact of human behavior on global warming.

• What is the effect of social media on environmentalism?
• What causes volcanic eruptions?
• What causes trees to die?
• What are the effects of gravity?
• Why are plants green?
• Why do trees shed their leaves?
• What causes a species to become endangered?
• What are some of the causes of animals losing their habitats?
• Describe the effect of overpopulation on the environment.
• What are the effects of famine on human population?
• What are the causes and effects of Antarctica floods?
• What are the effects of pollution on the ocean?
• What effect do cars have on the environment?
• Why is it important to manage wildfires?
• What has been the impact of DNA on crime scene processing?

• What are the impacts of deforestation in Brazil?
• What are the effects of GMO foods on human health?
• What are the impacts of immunizations on human health?

Technology and Social Media Cause & Effect Essay Topics

• What are the effects of social media on adolescent development?
• How does technology affect productivity?
• What are the effects of video games on childhood development?
• How do cell phones affect human relationships?
• What are some reasons a teacher might ban cell phones from class?

• What effects do cell phones have on sleep?
• What effects did the invention of the Internet have on technology?
• What were the origins of cyberbullying?
• What are the effects of tablet use on small children?
• How has online dating changed relationships?
• What makes some people less likely to use social media?
• What are the effects of social media on privacy?
• How does the rise of TikTok affect Facebook and Instagram?
• In what ways could social media lead to extremism?
• What is the impact of social media on the increasing popularity of plastic surgery and other enhancements?

• What are some of the benefits of owning a smartphone and what are some of the drawbacks?
• What has been the impact of online shopping on brick-and-mortar stores?
• What has been the impact of smartphones on marriages and relationships?
• What are the causes and effects of texting while driving?
• What has the rise of “influencers” meant for Hollywood?
• In what ways have photo filters influenced young people’s self-esteem?

Culture and Social Issues Cause & Effect Essay Topics

• What are some of the reasons for substance abuse in young people?
• What are some of the effects of bullying?
• How does economic status affect the quality of health care?
• What are some of the causes of homelessness?
• Explain the effects of ignorance on discrimination.
• What are the impacts of death sentences on social justice?

• How does financial success affect societal privilege?
• What effects does growing up poor have on children?
• In what ways does religion influence society?
• What are the effects of immigration on a host country?
• What are the effects of ageism on job opportunities?
• What is the impact of LGBTQ+ representation in TV and movies?
• What are the effects of school shootings on politics?
• How do school uniforms affect students?
• What are the impacts of high student debt?
• What are the impacts of body shaming on people?
• What were the lasting impacts of the AIDS epidemic on society?

• What impact does banning abortion have in the United States?
• What has been the impact of marriage equality in the United States?
• What are the causes and effects of noise pollution?
• What are the causes and effects of inflation on the economy?
• What are the effects of TV shows on our behavior?

Sports Cause & Effect Essay Topics

• Examine the effects of exercise on mental health.
• What led to baseball being an iconic American sport?
• What drives people to participate in extreme sports?
• In what ways did globalization affect modern sports?
• What were the effects of doping on amateur and professional sports?
• Select a sport and write about the historical factors that led to the popularization of that sport.

• Describe the ways in which youth sports influence a child’s development.
• What were the driving forces behind the first Olympics?
• How can team sports help develop social skills?
• How have e-sports changed the sporting landscape?
• In what ways do race biases influence sports?

• What are the effects of regular workouts on immunity?
• How does participating in sports affect leadership skills?
• In what ways can sports lead to character development?
• What effect does famous athletes’ social commentary have on their fans?

History Cause & Effect Essay Topics

• What are the effects of the war in Syria on the United States?
• What have been the lasting effects of the Civil Rights Movement?
• What were the causes and effects of the attack on Pearl Harbor?
• What led up to the Berlin Wall being torn down and what effects did that have?

• What lasting impact did 9/11 have on modern American society?
• What were the causes of the Salem Witch Trials?
• What was the cultural impact of the Spanish-American War?
• How has globalization led to modern-day slavery?
• What events led to the fall of the Roman Empire?
• What were the impacts of the Great Depression on women’s employment?
• How did cartels come into existence? What effect have they had on the United States and Mexico?
• What were the causes and effects of the Women’s Liberation Movement?
• Give an example of colonialism in history and name the resulting impact to the affected society.

• What led to the rise of ISIS and what has the impact been on international security?
• What factors led to the Titanic’s sinking?
• What were the causes and effects of the Vietnam War?
• Choose an American president. What led him to become president and what were the effects of his presidency?

Mental Health Cause & Effect Essay Topics

• How can stress affect the immune system?
• How does social anxiety affect young people?
• How can high academic expectations lead to depression?
• What are the effects of divorce on young people?
• How does service in the armed forces lead to post-traumatic stress disorder?

• What are the effects of mindfulness on mental health?
• Describe the ways in which the COVID-19 pandemic has impacted mental health.
• How does childhood trauma impact childhood development?
• What impact does witnessing violence have on mental health?
• What is behind increasingly high levels of anxiety in modern American society?

• What are the causes and effects of panic attacks?
• What are the causes and consequences of high stress in the workplace?
• What are some of the causes of insomnia and in what ways does it affect mental health?
• What is the impact of staying home for an extended period of time?

Current Events Cause & Effect Essay Topics

• Choose a local public education campaign. What are the effects of that campaign?
• What are the causes and effects of migration?
• What are the causes and effects of terrorist attacks?

• What are the effects of legalizing genetic engineering research?
• How do low voting rates impact elections and government?
• What is the effect of raising the minimum wage?
• What are the effects of globalization on society?
• How does gerrymandering affect election outcomes?
• What are the causes and effects of police brutality?
• What are the causes and effects of political polarization?

• What are the causes and effects of fake news?
• What are the effects of global war on citizens?
• What is the effect of international aid on poverty or health?
• Why do some countries have nuclear weapons, and what does this mean for other countries?

Education Cause & Effect Essay Topics

• What are the effects of teacher quality on student success?
• What are the causes and effects of student loan debt?
• What are the causes and effects of low graduation rates?

• What are the effects of assigning homework?
• What are the causes and effects of school funding disparities?
• What are the causes and effects of the digital divide in education?
• What is the effect of AI on education?
• What are the causes and effects of student burnout?
• Should students be required to study a foreign language in school, and what are the effects of learning a foreign language?

• What effect has the COVID pandemic had on education?
• What are the effects of same-sex classrooms or schools?

What are your best cause-and-effect essay topics for students? Come exchange ideas in the We Are Teachers HELPLINE group on Facebook.

Plus, check out our list of interesting persuasive essay topics for kids and teens..

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Essay Papers Writing Online

Effective strategies and techniques for writing an engaging and informative cause and effect essay to captivate readers and convey key ideas clearly and coherently.

Writing is an art that allows us to express our thoughts, ideas, and emotions. It serves as a powerful medium to convey messages, inspire change, and provoke deep reflection in others. A well-written essay has the ability to captivate readers, making them question, analyze, and ultimately understand the subject matter at hand. In the realm of academic writing, cause and effect essays hold a special place. They provide a structured framework to illustrate the relationship between different events, phenomena, and actions, ultimately shedding light on the consequences that arise from specific causes.

When it comes to crafting an effective cause and effect essay, it is crucial to carefully analyze and understand the intricate web of connections that exist between various elements. This type of essay requires a meticulous approach, as every cause and every effect must be explored in detail to grasp their significance fully. Each paragraph should offer a clear and logical analysis, supported by relevant evidence and examples, in order to provide a comprehensive understanding of the subject matter.

Moreover, a successful cause and effect essay should demonstrate the writer’s ability to think critically and engage in deep analysis. It requires the writer to go beyond merely stating the obvious connections and venture into the realm of uncovering underlying causes and lesser-known effects. This level of depth not only showcases the writer’s understanding of the topic but also challenges the readers to think critically and question their preconceived notions.

In this comprehensive guide, we will delve into the art of writing a powerful cause and effect essay. Step by step, we will explore the key components, techniques, and strategies that will help you craft an essay that leaves a lasting impact. From choosing a compelling topic to outlining your ideas, from conducting thorough research to organizing your thoughts, this guide will equip you with the necessary tools to tackle any cause and effect essay with confidence and finesse.

Choose a compelling topic

Before diving into the process of writing a cause and effect essay, it is crucial to choose a topic that is both compelling and interesting. The topic you select will determine the direction and focus of your essay, so it is important to choose carefully.

When selecting a topic, consider something that is relatable and relevant to your audience. It should be something that they can connect with and understand. Additionally, try to choose a topic that has a significant impact or consequence, as this will make your essay more thought-provoking and compelling to read.

Brainstorm ideas and make a list of potential topics. Look for topics that have causal relationships that can be explored and analyzed. You can also consider current events or issues that are trending in the news or society. These topics are often controversial and can lead to powerful discussions and debates.

Once you have a list of potential topics, evaluate them based on personal interest and knowledge. It is easier to write about a topic that you are passionate about or have some understanding of. Research the topic further to ensure that there is enough information available to support your arguments and claims.

Remember that your topic choice will set the stage for the rest of your essay, so take your time and choose wisely. A compelling topic will captivate your audience and make your essay more impactful.

Conduct thorough research on the topic

To write an informative and impactful cause and effect essay, it is crucial to conduct thorough research on the chosen topic. Research provides a solid foundation for your essay, allowing you to gather relevant and accurate information to support your arguments.

When conducting research, make sure to explore a variety of credible sources such as books, academic journals, expert opinions, and reputable websites. This will help you gain a comprehensive understanding of the topic and ensure the accuracy and reliability of your information.

Take your time to read and analyze the available sources, highlighting key points, data, and statistics that are relevant to your essay. Look for patterns, trends, and causal relationships that you can incorporate into your writing.

It is also essential to consider different perspectives and opinions on the topic. Engage with diverse viewpoints to gain a well-rounded understanding and develop a nuanced argument in your essay.

While researching, be sure to take detailed notes and properly cite your sources. This will help you avoid plagiarism and ensure that you provide proper credit to the original authors.

Remember to critically evaluate the information you gather during your research. Look for reliable sources that are based on well-established research and avoid using unreliable or biased information.

By conducting thorough research, you will be equipped with the necessary knowledge and understanding to write an effective cause and effect essay. Your research findings will form the backbone of your essay and allow you to present well-supported arguments and conclusions.

Create a clear thesis statement

In order to write a compelling cause and effect essay, it is essential to start with a clear and well-defined thesis statement. The thesis statement serves as the main idea or argument of your essay, providing a roadmap for the reader to understand the cause-and-effect relationship you will be exploring. A strong thesis statement not only sets the tone for the entire essay but also helps you stay focused and organized as you develop your argument.

A compelling thesis statement:

• Clearly states the cause and its corresponding effect
• Expresses a strong opinion or position
• Demonstrates the significance of the cause-effect relationship

When creating your thesis statement, it is important to be specific and concise. Avoid vague language or broad statements that lack focus. Instead, strive for clarity and precision in your wording to ensure that your thesis statement effectively conveys the main point of your essay.

Develop a strong outline

Creating a well-structured outline is crucial when crafting a compelling cause and effect essay. A strong outline serves as a roadmap for your writing, guiding you in organizing your ideas and presenting them in a logical and coherent manner.

An effective outline helps you identify the main points you want to discuss in your essay, as well as the relationships between them. It allows you to plan the flow of your arguments and ensure that you provide sufficient evidence and examples to support your claims. Additionally, an outline helps you avoid repetition and tangential discussions, keeping your essay focused and on-topic.

As you develop your outline, consider the cause and effect relationship you want to explore in your essay. Determine whether you will focus on a single cause with multiple effects, a single effect with multiple causes, or a combination of both. Use strong topic sentences to introduce your main points and sub-points, ensuring they are interconnected and build upon one another to create a cohesive and balanced argument.

Remember to revise and refine your outline as you conduct research and gather evidence for your essay. Your outline should evolve as you uncover new information and insights, enabling you to incorporate them into your essay seamlessly. By putting effort into developing a strong outline, you set yourself up for success by establishing a clear structure and direction for your cause and effect essay.

Use proper transitions to connect ideas

In order to effectively convey the cause and effect relationship in your essay, it is essential to use appropriate transitional words and phrases to connect your ideas. These transitions help guide the reader through your essay and make it easier to understand how one idea leads to another.

Transitions act as bridges, connecting different parts of your essay and making it flow smoothly. They provide a sense of coherence and logical progression, allowing the reader to follow your thought process and understand the causal relationship between events or phenomena.

Examples of commonly used transitions include words like “therefore,” “thus,” “consequently,” “as a result,” and “because.” These words indicate cause and effect, and provide a clear connection between the ideas being presented. Other transitional words like “however,” “on the other hand,” and “in contrast” can be used to show a contrast or opposition between ideas.

In addition to single-word transitions, you can also use transitional phrases and clauses to effectively connect your ideas. Phrases like “due to,” “owing to,” “in light of,” and “in order to” can be used to explain the cause or reason behind a certain effect. Similarly, phrases like “as a result of,” “resulting in,” and “consequently” can be used to explain the effect or consequence of a specific cause.

Using transitions not only enhances the clarity and coherence of your essay, but also improves its overall quality. It helps the reader follow your thought process, understand the cause and effect relationships, and makes your essay more convincing and persuasive.

Support the cause and effect relationship with evidence

Substantiating the cause and effect relationship is a crucial aspect of writing an impactful essay. To convince your readers and make your arguments more persuasive, it is important to provide evidence that supports the causal connections you propose.

One effective way to provide evidence is through the use of statistics and data. Numbers can add credibility to your claims and strengthen the cause and effect relationship you are presenting. For example, if you are discussing the effects of climate change on the environment, you can cite specific data on rising temperatures, melting ice caps, or changes in weather patterns.

Additionally, anecdotal evidence can be used to support your arguments. Personal stories or experiences can provide a human element to your essay, making the cause and effect relationship more relatable to your readers. When using anecdotes, it is important to ensure that they are relevant and representative of the broader topic you are discussing.

Expert opinions and quotes can also serve as valuable evidence to back up your claims. Including viewpoints from authorities in the field can lend credibility to your arguments and strengthen the cause and effect relationship you are presenting. Be sure to attribute the opinions and quotes to their respective sources to maintain accuracy and integrity in your work.

In addition to these forms of evidence, it is important to conduct thorough research to find supporting studies, experiments, or examples that validate your claims. Well-researched evidence can strengthen the cause and effect relationship in your essay, making your arguments more convincing and effective.

Furthermore, it is crucial to present the evidence in a clear and organized manner. Utilizing tables or charts can help summarize and present complex data in an easily understandable format. This visual representation can enhance the clarity of your arguments and make the cause and effect relationship more accessible to your readers.

In summary, supporting the cause and effect relationship with evidence is essential in writing a compelling essay. Using statistics, anecdotes, expert opinions, and well-researched evidence can strengthen your arguments and make your essay more persuasive. Presenting the evidence in a clear and organized manner, such as through the use of tables, can further enhance the impact of your writing.

Edit and revise your essay for clarity and coherence

After completing your initial draft, it’s important to thoroughly edit and revise your essay to ensure clarity and coherence. Editing allows you to refine and polish your ideas, while revision helps you to enhance the overall flow and organization of your essay.

When editing your essay, pay attention to the clarity of your ideas. Make sure that your sentences are clear and concise, and that your ideas are expressed in a logical and coherent manner. Eliminate any unnecessary repetition or redundancy, and ensure that each paragraph and sentence contributes to the overall theme and purpose of your essay.

During the revision process, focus on the coherence of your essay. Check that your ideas are connected and presented in a logical order. Make sure that each paragraph transitions smoothly into the next, and that the overall structure of your essay is coherent and easy to follow.

As you edit and revise, pay attention to your grammar, spelling, and punctuation. Ensure that you are using proper grammar and punctuation throughout your essay, and check for any spelling errors or typos. A well-edited and revised essay is not only clear and coherent, but also free from grammatical and spelling mistakes.

• Check that your introduction effectively introduces the topic and thesis statement, and that your conclusion effectively wraps up your essay.
• Read your essay aloud to identify any awkward or unclear sentences, and make necessary corrections.
• Ask a friend or classmate to read your essay and provide feedback, as a fresh set of eyes can often catch errors or areas for improvement that you may have overlooked.

In conclusion, editing and revising your essay is an essential step in the writing process. By ensuring clarity and coherence, you can effectively convey your ideas to your readers and present a well-crafted and polished essay.

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Cause and Effect in Composition

Glossary of Grammatical and Rhetorical Terms

• An Introduction to Punctuation
• Ph.D., Rhetoric and English, University of Georgia
• M.A., Modern English and American Literature, University of Leicester
• B.A., English, State University of New York

In composition , cause and effect is a method of paragraph or essay development in which a writer analyzes the reasons for—and/or the consequences of—an action, event, or decision.

A cause-and-effect paragraph or essay can be organized in various ways. For instance, causes and/or effects can be arranged in either chronological order or reverse chronological order. Alternatively, points can be presented in terms of emphasis , from least important to most important, or vice versa.

Examples and Observations

• "If you prove the cause , you at once prove the effect ; and conversely nothing can exist without its cause." (Aristotle, Rhetoric )
• Immediate Causes and Ultimate Causes "Determining causes and effects is usually thought-provoking and quite complex. One reason for this is that there are two types of causes: immediate causes , which are readily apparent because they are closest to the effect, and ultimate causes , which, being somewhat removed, are not so apparent and may perhaps even be hidden. Furthermore, ultimate causes may bring about effects which themselves become immediate causes, thus creating a causal chain . For example, consider the following causal chain: Sally, a computer salesperson, prepared extensively for a meeting with a client (ultimate cause), impressed the client (immediate cause), and made a very large sale (effect). The chain did not stop there: the large sale caused her to be promoted by her employer (effect)." (Alfred Rosa and Paul Eschholz, Models for Writers , 6th ed. St. Martin's Press, 1998)
• Composing a Cause/Effect Essay "For all its conceptual complexity, a cause/effect essay can be organized quite simply. The introduction generally presents the subject(s) and states the purpose of the analysis in a clear thesis . The body of the paper then explores all relevant causes and/or effects, typically progressing from least to most influential or from most to least influential. Finally, the concluding section summarizes the various cause/effect relationships established in the body of the paper and clearly states the conclusions that can be drawn from those relationships." (Kim Flachmann, Michael Flachmann, Kathryn Benander, and Cheryl Smith, The Brief Prose Reader . Prentice Hall, 2003)
• Causes of Child Obesity "Many of today's kids are engaged in sedentary pursuits made possible by a level of technology unthinkable as recently as 25 to 30 years ago. Computer, video, and other virtual games, the ready availability of feature films and games on DVD, plus high-tech advancements in music-listening technology have come down into the range of affordability for parents and even for the kids themselves. These passive pursuits have produced a downside of reduced physical activity for the kids, often with the explicit or implicit consent of the parents. . . . "Other fairly recent developments have also contributed to the alarming rise in child obesity rates. Fast food outlets offering consumables that are both low in price and low in nutritional content have exploded all over the American landscape since the 1960s, especially in suburban areas close to major highway interchanges. Kids on their lunch breaks or after school often congregate in these fast food outlets, consuming food and soft drinks that are high in sugar, carbohydrates, and fat. Many parents, themselves, frequently take their children to these fast food places, thus setting an example the kids can find justification to emulate." (MacKie Shilstone, Mackie Shilstone's Body Plan for Kids . Basic Health Publications, 2009)
• Cause and Effect in Jonathan Swift's "A Modest Proposal" "'A Modest Proposal' is a brilliant example of the use of non-argumentative devices of rhetorical persuasion . The whole essay, of course, rests broadly upon the argument of cause and effect : these causes have produced this situation in Ireland, and this proposal will result in these effects in Ireland. But Swift, within the general framework of this argument, does not employ specific argumentative forms in this essay. The projector chooses rather to assert his reasons and then to amass them by way of proof ." (Charles A. Beaumont, Swift's Classical Rhetoric . Univ. of Georgia Press, 1961)
• Effects of Automobiles "I worry about the private automobile. It is a dirty, noisy, wasteful, and lonely means of travel. It pollutes the air, ruins the safety and sociability of the street, and exercises upon the individual a discipline which takes away far more freedom than it gives him. It causes an enormous amount of land to be unnecessarily abstracted from nature and from plant life and to become devoid of any natural function. It explodes cities, grievously impairs the whole institution of neighborliness, fragmentizes and destroys communities. It has already spelled the end of our cities as real cultural and social communities, and has made impossible the construction of any others in their place. Together with the airplane, it has crowded out other, more civilized and more convenient means of transport, leaving older people, infirm people, poor people and children in a worse situation than they were a hundred years ago." (George F. Kennan, Democracy and the Student Left , 1968)
• Examples and Effects of Entropy "Because of its unnerving irreversibility, entropy has been called the arrow of time. We all understand this instinctively. Children's rooms, left on their own, tend to get messy, not neat. Wood rots, metal rusts, people wrinkle and flowers wither. Even mountains wear down; even the nuclei of atoms decay. In the city we see entropy in the rundown subways and worn-out sidewalks and torn-down buildings, in the increasing disorder of our lives. We know, without asking, what is old. If we were suddenly to see the paint jump back on an old building, we would know that something was wrong. If we saw an egg unscramble itself and jump back into its shell, we would laugh in the same way we laugh as a movie run backward." (K.C. Cole, "The Arrow of Time." The New York Times , March 18, 1982)
• Affect vs. Effect: How to Choose the Right Word
• Understanding General-to-Specific Order in Composition
• Definition and Examples of the Topoi in Rhetoric
• What Is an Annotation in Reading, Research, and Linguistics?
• How to Use Exemplification in Writing
• Polemic: Definition and Examples
• Learn How to Use Extended Definitions in Essays and Speeches
• Understanding Organization in Composition and Speech
• Periodical Essay Definition and Examples
• What Does It Mean to Make a Claim During an Argument?
• Definition and Examples of Formal Essays
• Definition and Examples of Propaganda
• Definition and Examples of Humorous Essays
• Organizational Strategies for Using Chronological Order in Writing
• Definition Examples of Collage Essays

Preprints with The Lancet is part of SSRN´s First Look, a place where journals identify content of interest prior to publication. Authors have opted in at submission to The Lancet family of journals to post their preprints on Preprints with The Lancet. The usual SSRN checks and a Lancet-specific check for appropriateness and transparency have been applied. Preprints available here are not Lancet publications or necessarily under review with a Lancet journal. These preprints are early stage research papers that have not been peer-reviewed. The findings should not be used for clinical or public health decision making and should not be presented to a lay audience without highlighting that they are preliminary and have not been peer-reviewed. For more information on this collaboration, see the comments published in The Lancet about the trial period, and our decision to make this a permanent offering, or visit The Lancet´s FAQ page, and for any feedback please contact [email protected] .

Dietary Caffeine Intake and the Risk of All-Cause and Cardiovascular Mortality Due to Different Metabolic Disorders

29 Pages Posted: 5 Aug 2024

China Medical University - Department of Endocrinology and Metabolism

Weiping Teng

Xiaoguang shi.

Importance: Caffeine intake is considered to be related to all-cause mortality and cardiovascular mortality. However, the relationship between caffeine intake and mortality among different populations with metabolic disorders has not yet been studied. OBJECTIVE: Evaluate the relationship between caffeine intake and all-cause mortality as well as cardiovascular mortality, and explore the association between caffeine and mortality in different metabolic disorder conditions. Design, Setting, and Participants: For this cohort study, information on a nationally representative cohort of 11599 US adults was extracted from the National Health and Nutrition Examination Survey (NHANES) from 2001 to 2016, with mortality ascertained through December 31, 2019，with an average follow-up time of 12.34 years. Data were analyzed between January 1 and june 30, 2024.EXPOSURES: To assess the relationship between caffeine intake and mortality risk among individuals with metabolic syndrome and its different metabolic component abnormalities. Restricted cubic spline curve was used to determine optimal cutoff points for caffeine. Main Outcome and Measures: The survival outcome were all-cause mortality and cardiovascular mortality. Mortality data were obtained from the Centers for Disease Control and Prevention website and linked to the NHANES database using the unique subject identifier. Results: Among 11,599 participants followed for the median follow-up time of 9.35 years (108,497.8 person-years), hazard ratios (HRs) for all-cause mortality decreased with increasing caffeine intake (Q3, 0.75(0.66,0.86); Q4, 0.70(0.60,0.80); P for trend <0.001) after adjusting for confounding factors. HRs for cardiovascular mortality also decreased with increasing caffeine intake (Q3, 0.60(0.48,0.75); Q4, 0.50(0.40,0.62); P for trend <0.001). Caffeine intake was inversely associated with all-cause mortality in all metabolic subgroups. The dose-response relationship indicates that in the general population, the risk of mortality decreases with caffeine intake exceeding 45mg per day, for metabolic disorders individuals 25mg per day. Conclusions and Relevance: This study confirmed a negative correlation between caffeine intake and mortality risk. Metabolic disorders individuals those with metabolic syndrome, increased waist circumference, and elevated triglycerides might benefit from reduced mortality risk from non-cardiovascular diseases due to caffeine intake. People with metabolic abnormalities have a lower threshold for caffeine intake that benefits both all-cause and cardiovascular mortality. Funding: This work was supported by the Shengjing Hospital 345 Talent Program. Liaoning Provincial Natural Science Foundation Joint Fund (Doctoral Research Start-up Project) (2023-BSBA-333) Declaration of Interest: We declare we have no conflicts of interest. Ethical Approval: MISSING

Note: Funding Information: This work was supported by the Shengjing Hospital 345 Talent Program. Liaoning Provincial Natural Science Foundation Joint Fund (Doctoral Research Start-up Project) (2023- BSBA-333). Declaration of Interests: We declare we have no conflicts of interest. Ethics Approval Statement: All data for this project is obtainable and complies with the NCHS Ethics Review Board Approval.

Keywords: caffeine, all-cause mortality, cardiovascular mortality, metabolic disorders.

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China Medical University - Department of Endocrinology and Metabolism ( email )

No 155, Nanjing Bei Street Shenyang, Liaoning 110001 China

Ying Sun (Contact Author)

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Matthew Perry investigation: What we know about the people charged in his death

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Two doctors and a live-in personal assistant to Matthew Perry are among the people charged following a months-long investigation into how the prescription drug ketamine that contributed to the actor’s death was procured.

Prosecutors on Thursday charged five people in connection with the death of the “Friends” star, who was found dead in the hot tub at his Pacific Palisades home on Oct. 28. Trace amounts of ketamine — which is sometimes used to treat depression — were found in his stomach, according to the Los Angeles County medical examiner.

But the level found in his blood was about the same as would be used during general anesthesia, his autopsy showed.

Since then, authorities have been working to determine how Perry got the drug, which caused cardiovascular overstimulation and respiratory depression. Ketamine is a legal medication commonly used as an anesthetic, but it can be abused recreationally. According to the American Addiction Centers, users have described ketamine as producing “out-of-body experiences” and making them feel as if they’re “melting in their surroundings.”

The Times reported in June that investigators with the Los Angeles Police Department, the federal Drug Enforcement Administration and the U.S. Postal Service had linked several people to procurement of the ketamine.

A dealer known as ‘Ketamine Queen’ and 2 doctors among 5 charged in death of Matthew Perry

Federal authorities have filed drug charges against five individuals, including two doctors, in connection with the death of ‘Friends’ star Matthew Perry.

Aug. 15, 2024

The named defendants in the case include two physicians, Perry’s live-in personal assistant who authorities say injected him with ketamine and a dealer dubbed the “Ketamine Queen” by federal agents.

Here’s what we know about the people named in the indictment, which was unsealed Thursday:

Jasveen Sangha, 41, also known as the “Ketamine Queen” The North Hollywood woman was charged with one count of conspiracy to distribute ketamine, one count of maintaining a drug-involved premises, one count of possession with intent to distribute methamphetamine, one count of possession with intent to distribute ketamine and five counts of distribution of ketamine, according to the indictment. Prosecutors say Perry’s personal assistant began obtaining ketamine for the actor from Sangha and a street dealer in mid-October. She is accused of selling about 50 vials of the drug to the actor for $11,000.

Prosecutors allege in court documents that Sangha engaged in a five-year-long drug business selling meth, ketamine and other drugs. But her specialty was ketamine, and she held “herself out as a celebrity drug dealer with high quality goods,” according to court records.

Sangha rented the “stash house” where authorities said she conducted her drug-selling business for several thousands of dollars per month and is leasing a 2024 BMW, but she has been unemployed since 2019, prosecutors wrote. Previously, she claimed to be self-employed as an artist and singer.

In court papers, prosecutors highlighted the contents of her social media accounts to suggest how enmeshed she is in the drug culture. A photo posted on social media shows Sangha wearing a beaded bracelet with the word “mushy” on it and adorned with mushrooms. The bracelet is a type of kandi, an item popular in the rave culture intended to be worn and sometimes given to fellow ravers. On the photo, she wrote “#ravetothegrave”

• Dr. Salvador Plasencia, 42, referred to as “Dr. P” Federal prosecutors say a month before Perry’s death, Plasencia learned that the actor was interested in obtaining ketamine. He is accused of injecting Perry with ketamine at his Pacific Palisades home on Sept. 30 and then leaving vials of ketamine, syringes and injection instructions for Perry’s assistant. Plascencia was charged with seven counts of distribution of ketamine and two counts of altering and falsifying documents or records related to the federal investigation.

Dr. Mark Chavez, 54, a San Diego-based physician Chavez admitted in a plea agreement that he sold ketamine to Plasencia, including some he diverted from his former ketamine clinic, according to prosecutors. He also made false statements to a wholesale ketamine distributor and submitted a false prescription in the name of a former patient without that patient’s knowledge or permission, prosecutors said. He pleaded guilty to conspiracy to distribute ketamine in connection with Perry’s death.

Chavez and Plasencia apparently have known each other for years, according to their respective LinkedIn profiles. Chavez wrote in a recommendation on Plasencia’s page that they’ve “worked closely” and that Chavez acted as a “coach and mentor over many years.” Chavez wrote about Plasencia: “He is inquisitive and clever and is a committed life long learner and teacher. Dr. Plasencia is committed to providing his patients with family centered care as well as running socially responsible businesses.”

Returning the favor, Plasencia wrote in a recommendation of Chavez that his mentoring “has been extremely helpful to me as I navigated my own path as a medical entrepreneur.”

• Kenneth Iwamasa, 59, Perry’s live-in personal assistant Iwamasa pleaded guilty Aug. 7 to one count of conspiracy to distribute ketamine causing death. He admitted to injecting Perry with ketamine without medical training, including performing several injections on the actor the day he died, authorities said.
• Erik Fleming, 54 Fleming, described by prosecutors as a drug dealer and acquaintance of Perry’s, admitted to authorities that he received vials of ketamine from Sangha and distributed 50 vials of the drug to Iwamasa, half of them four days before Perry’s death. Fleming pleaded guilty Aug. 8 to one count of conspiracy to distribute ketamine and one count of ketamine that resulted in death.

For the record:

6:29 p.m. Aug. 15, 2024 An earlier version of this article referred to Dr. Cesar Chavez. The physician’s name is Mark Chavez.

Sangha was arrested in March on narcotics charges and posted a $100,000 bond in a separate case.

During a raid at Sangha’s home on March 19, authorities seized 1,978 grams of methamphetamine pills, 79 bottles of liquid ketamine, 2,127 grams of pills suspected of being Xanax, 323 grams of a substance suspected of being psilocybin mushrooms and 128 grams of suspected cocaine, according to federal prosecutors. Authorities also found a journal in her home that detailed thousands of dollars in drug transactions, according to Thursday’s indictment.

Prosecutors say that Perry was not the only victim who overdosed on Sangha’s product.

In August 2019, she sold ketamine to Cody McLaury hours before his death. One of McLaury’s family members texted Sangha: “The ketamine you sold my brother killed him. It’s listed as the cause of death,” according to court records.

Days later, according to the records, Sangha searched on Google, “can ketamine be listed as a cause of death[?]”

More to Read

Matthew Perry’s shocking last month on ketamine: ‘I wonder how much this moron will pay’

Aug. 16, 2024

Column: The arrests in Matthew Perry’s death expose a system built to prey on addicts

With arrests in Matthew Perry death, is L.A.’s ketamine bubble about to burst?

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• Published: 13 August 2024

Reducing climate change impacts from the global food system through diet shifts

• Yanxian Li   ORCID: orcid.org/0000-0002-1947-7541 1 ,
• Pan He   ORCID: orcid.org/0000-0003-1088-6290 2 , 3 ,
• Yuli Shan   ORCID: orcid.org/0000-0002-5215-8657 4 ,
• Ye Hang   ORCID: orcid.org/0000-0002-1368-905X 4 ,
• Shuai Shao   ORCID: orcid.org/0000-0002-9525-6310 6 ,
• Franco Ruzzenenti 1 &
• Klaus Hubacek   ORCID: orcid.org/0000-0003-2561-6090 1  

Nature Climate Change ( 2024 ) Cite this article

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How much and what we eat and where it is produced can create huge differences in GHG emissions. On the basis of detailed household-expenditure data, we evaluate the unequal distribution of dietary emissions from 140 food products in 139 countries or areas and further model changes in emissions of global diet shifts. Within countries, consumer groups with higher expenditures generally cause more dietary emissions due to higher red meat and dairy intake. Such inequality is more pronounced in low-income countries. The present global annual dietary emissions would fall by 17% with the worldwide adoption of the EAT-Lancet planetary health diet, primarily attributed to shifts from red meat to legumes and nuts as principal protein sources. More than half (56.9%) of the global population, which is presently overconsuming, would save 32.4% of global emissions through diet shifts, offsetting the 15.4% increase in global emissions from presently underconsuming populations moving towards healthier diets.

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Simple dietary substitutions can reduce carbon footprints and improve dietary quality across diverse segments of the US population

The ongoing nutrition transition thwarts long-term targets for food security, public health and environmental protection

Adoption of the ‘planetary health diet’ has different impacts on countries’ greenhouse gas emissions

Food choices impact both our health and the environment 1 , 2 . The food system is responsible for about one-third of global anthropogenic GHG emissions 3 , 4 and climate goals become unattainable without efforts to reduce food-related emissions 5 , 6 . However, not everyone contributes the same way to food-related emissions because of disparities in lifestyle, food preferences and affordability within and across countries 7 , 8 , 9 . High levels of food consumption (especially animal-based diets), one of the leading causes of obesity and non-communicable diseases 10 , 11 , lead to substantial emissions 9 , 12 . Simultaneously, >800 million people still suffer from hunger and almost 3.1 billion people cannot afford a healthy diet 13 . Ending hunger and malnutrition while feeding the growing population by extending food production will further exacerbate climate change 14 , 15 . Given the notable increase in emissions driven by food consumption despite efficiency gains 16 , changing consumer lifestyles and choices are needed to mitigate climate change 17 .

Research shows that widespread shifts towards healthier diets, aligned with the sustainable development goals (SDGs) of the United Nations 18 , offer solutions to this complex problem by eradicating hunger (SDG 2), ensuring health (SDG 3) and mitigating emissions (SDG 13) 19 , 20 , 21 , 22 . Numerous dietary options have been proposed as guidelines for diet shifts 1 , 23 , 24 . The planetary health diet 12 , proposed by the EAT-Lancet Commission, stands out as a prominent option. It aims to improve health while limiting the impacts of the food system within planetary boundaries by providing reference intake levels for different food categories 9 , 25 . It is flexibly compatible with diversities and preferences of regional and local diets 12 . Previous research has estimated changes in country-specific environmental impacts, including GHG emissions 26 , 27 , 28 and water consumption 25 , resulting from adopting the planetary health diet. However, there is limited evidence on how different population groups will contribute differently in this process 7 .

Food consumption and associated emissions differ as a result of disparities in consumer choices guided by social and cultural preferences, wealth and income 29 . Quantifying food-related emissions along the entire supply chain for different products and population groups provides information for emission mitigation through changing consumer choices 17 . With the improved availability of household consumption data, recent studies have revealed inequality in energy consumption 30 , 31 and carbon emissions 17 , 32 , 33 , 34 . Although there are several studies on income- or expenditure-specific food-related emissions within individual countries based on survey-based data 35 , 36 , 37 , 38 , previous studies have not assessed global food-related emissions with a detailed breakdown into specific products and population groups. Furthermore, reducing the overconsumption of wealthy or otherwise overconsuming groups can increase the availability of resources for reducing hunger and malnutrition 7 . However, it remains unclear how emissions from different population groups would change in response to global diet shifts.

To fill these gaps, this study evaluates GHG emissions (CO 2 , CH 4 and N 2 O) throughout the global food supply chains (including agricultural land use and land-use change, agricultural production and beyond-farm processes) 16 induced by diets, termed ‘dietary emissions’, in 2019 and the potential emission changes of global diet shifts. Food loss and waste during household consumption 25 , 39 , 40 have been subtracted from the national food supply to obtain dietary intake. We quantify dietary emissions of 140 products 16 (classified into 13 food categories 12 ) on the basis of the global consumption-based emissions inventory of detailed food products 16 . By linking detailed food intake amounts to the food consumption patterns of 201 global expenditure groups (grouped according to the per capita total expenditure of each group) from the household-expenditure dataset 41 based on the World Bank Global Consumption Database (WBGCD) 42 , we analyse the unequal distribution of dietary emissions in 139 countries or areas, covering 95% of the global population. Despite limitations, the total expenditure of consumers, which effectively reflects patterns in household income, consumption and asset accumulation, is a useful approximation to represent levels of income and wealth 31 , 43 . Additionally, we build a scenario of shifting from diets in 2019 to the global planetary health diet to estimate emission changes ( Methods ). This study investigates differences in dietary emissions among regions, countries and population groups, identifying areas where efforts are needed to mitigate emissions during the global transition towards a healthier and more planet-friendly diet.

Present dietary emissions across countries

In this study, dietary emissions account for emissions along the entire global food production supply chains, which are allocated to final consumers of diets. We use the term ‘GHG footprints’ to specifically refer to the dietary emissions of an individual over 1 year 17 , 34 . The total dietary emissions and country-average per capita GHG footprints show different distributions across countries in 2019 (Fig. 1a ; for detailed food categories see Supplementary Figs. 1 – 9 ). The present total global dietary emissions reach 11.4 GtCO 2 e (95% confidence interval 8.2–14.7 Gt) (details of uncertainty ranges in Supplementary Tables 1 and 2 ). China (contributing 13.5% of emissions) and India (8.9%), the world’s most populous countries (Supplementary Table 3 ), are the largest contributors to global dietary emissions. Alongside Indonesia, Brazil, the United States, the Democratic Republic of Congo, Pakistan, Russia, Japan and Mexico, the top ten contributors represent 57.3% of global dietary emissions but with very unequal per capita emissions within and between countries. We find the highest country-average per capita footprints in Bolivia, with 6.1 tCO 2 e, followed by Luxembourg, Slovakia, Mongolia, the Netherlands and Namibia, with >5.0 tCO 2 e (Supplementary Discussion 2.1 ). Haiti (0.36 tCO 2 e) and Yemen (0.38 tCO 2 e) have the lowest country-average footprints, followed by Burundi, Ghana and Togo. Insufficient food intake of residents due to limited food affordability 44 , 45 is the root cause of low footprints in these low- and lower-middle-income countries 46 .

a , Total and per capita dietary emissions for 139 countries/areas. b , Regional dietary emissions from different food categories and populations. The bar chart (left primary axis) shows the regional emission amounts and the line chart (right secondary axis) shows the number of regional populations. Columns are ordered by the descending per capita GDP of regions (Supplementary Tables 5 and 6 ). USA, United States; AUS, Australia; WE, Western Europe; CAN, Canada; JPN, Japan; RUS, Russia; ROEA, Rest of East Asia; EE, East Europe; CHN, China; ROO, Rest of Oceania; NENA, Near East and North Africa; BRA, Brazil; ROLAC, Rest of Latin America and the Caribbean; ROSEA, Rest of Southeast Asia; IDN, Indonesia; IND, India; ROSA, Rest of South Asia; and SSA, Sub-Saharan Africa. Details for the division and scope of regions are shown in Supplementary Fig. 10 and Supplementary Tables 7 and 8 . Country classification by income levels is based on the World Bank 46 . Credit: World Countries basemap, Esri ( https://hub.arcgis.com/datasets/esri::world-countries/about ).

Source data

While animal-based (52%) and plant-based (48%) products contribute nearly equally to global dietary emissions 4 , 16 , the latter accounts for 87% of calories in global diets (Supplementary Table 4 ). The three main sources of emissions, namely red meat (beef, lamb and pork) (5% of calories), grains (51%) and dairy products (5%), contribute to 29%, 21% and 19% of global emissions, respectively. The substantial emissions from red meat and dairy products are attributed to their considerably higher emissions per unit of calories compared to other categories (Supplementary Table 4 ).

To highlight emission differences at a regional level, we further group the country-level results into 18 regions according to geographical locations and development levels (Fig. 1b and Supplementary Fig. 10 ). In most regions, animal-based products contribute fewer calories (less than a quarter) (Supplementary Data 21 ) but yield more emissions than plant-based products, especially in Australia (84% from animal-based products), the United States (71%) and the region Rest of East Asia (71%) where residents excessively consume both red meat and dairy products. However, the consumption of plant-based products in Indonesia (83% of total calories), Rest of Southeast Asia (92%) and Sub-Saharan Africa (77%) accounts for the most emissions, at 92%, 73% and 64%, respectively. Southeast Asia including Indonesia has a high-emission proportion from grains (42%) due to the prevalent meals dominated by rice. The typical food basket in Sub-Saharan Africa is broadly made up of grains, tubers, legumes and nuts 25 , 47 , representing over half of the regional emissions.

Unequal distribution of dietary emissions within countries

We find substantial differences in per capita GHG footprints within countries and regions. To clearly present the distribution of footprints within each country and region, individuals are sorted in ascending order of their total expenditure levels and then sequentially allocated to ten expenditure deciles with equal population size (Supplementary Fig. 11 and Fig. 2a ). As expenditures increase, individuals tend to have higher levels of footprints, with the largest increase attributed to red meat and dairy products. Richer populations usually have higher per capita footprints related to animal-based products than the poorer in most regions (Fig. 2b ). However, there are differences in per capita footprints within expenditure deciles. For example, even in high-income countries such as Australia and Japan, the dietary intake of red meat for some people in the poorest deciles falls below the recommended levels (Supplementary Data 15 ). Rest of East Asia is one exception, with the poorest decile having high footprints due to a substantial intake of red meat, as seen in Mongolia where beef and mutton are the most common dish 48 .

a , GHG footprints from all types of food categories. The size of the bubble refers to the average total expenditure represented by the decile. b , GHG footprints from different food categories. The colours of bubbles in a and b indicate expenditure deciles ranging from the poorest in blue to the wealthiest in red and are comparable only within each region.

Footprints related to plant-based products in specific regions show a different trend from animal-based products as expenditures increase. The middle expenditure groups are responsible for the highest footprints associated with grains in Sub-Saharan Africa and Southeast Asia and the highest footprints of tubers, vegetables and fruits (mainly starchy tropical fruits 49 ) in the Rest of Oceania. These locally produced, high-carbohydrate products are traditional staple foods. In poor countries, agricultural policy primarily targets improving the productivity of staple food, with little investment in the market and facilities for nutrient-rich products 50 , 51 . Consequently, the need for dietary diversity for middle- and low-income people is not adequately addressed 50 , leading to increased consumption of these lower-cost products. However, wealthier consumers can afford more expensive products, such as red meat, reducing their reliance on these staple products.

We use the GHG footprint Gini (GF-Gini) coefficient, calculated on the basis of data from 201 expenditure groups, to measure the dietary emission inequality within a country (Fig. 3 ), with 0 indicating perfect equality and 1 indicating perfect inequality. The inequality of dietary emissions tends to decline with the increase of the per capita GDP of a country, especially for animal-based products. We find the highest inequality of dietary emissions of food products generally in low-income countries, most of which are located in Sub-Saharan Africa. In Sub-Saharan Africa, the highest spending 10% of the population contributes 40% of the regional emissions from red meat, 39% from poultry and 35% from dairy products. In contrast, high-income countries generally have relatively low inequality with high levels of emissions despite country-to-country variations. The GF-Gini coefficients for all types of products of most Western European countries are <0.20 (Supplementary Tables 9 and 10 ), which is lower than for other high-income countries such as the United States, Australia, Canada and Japan.

a – j , The x axis represents the country-average per capita GDP, and the y axis represents the national GF-Gini coefficients of all types of ( a ) and different ( b – j ) food categories. b , Beef, lamb and pork. c , Dairy products. d , Poultry, eggs and fish. e , Grains. f , Tubers and starchy vegetables. g , Vegetables and fruits. h , Legumes and nuts. i , Added fats. j , All sugars. Logarithmic regression (red solid line) and locally weighted regression analysis (blue dotted line) are used to determine the relationship between the national GF-Gini coefficient (dependent variable) and the country-average per capita GDP (independent variable). The coefficients of determination ( R 2 ) and the exact P values from the two-sided Student’s t -test for the logarithmic regression are indicated in each subgraph. The error bands (grey shaded areas) represent 95% confidence intervals around the fitted logarithmic regression lines. Blue, orange and green dots represent all types of products, animal-based products and plant-based products, respectively.

Dietary emission shares across consumer groups

There are notable differences in dietary emission shares associated with food categories across expenditure deciles between regions (Fig. 4 ). In high-income countries, expenditure groups have relatively similar patterns of dietary emissions, with large shares of red meat and dairy products contributing the largest amount of emissions. Even poor consumer groups in high-income countries tend to be more likely to be able to afford animal-based products as a result of relatively lower prices for dairy products, eggs, white meat and processed red meat. This contrasts with the high prices of animal-based products due to supply constraints in most low- and lower-middle-income countries 52 , 53 . Except in high-income countries, starchy staple foods (including grains and tubers), with low prices but high-carbohydrate content 44 , 54 , constitute a large proportion of dietary emissions because of the high level of consumption, especially in Southeast Asia and Sub-Saharan Africa. As individuals’ expenditures increase in these countries, emission shares from starchy staple foods in total emissions decrease substantially. These changes demonstrate that as the affordability of food increases, populations tend to adopt instead more diverse diets composed of fewer starchy staple foods and more meat, dairy products, vegetables and fruits. This trend generally aligns with Bennett’s Law 25 , 55 , 56 . For example, research shows that with rapid economic growth, China’s urban or high-income groups increase their intake of non-starchy foods to fulfil their requirements of dietary diversity 35 , while poorer groups, often engaging in strenuous physical jobs, predominantly consume inexpensive starchy staple foods. One exception is Rest of Oceania, where poorer groups have higher percentages of emissions from not only tubers but also vegetables and fruits. Owing to relatively low expenditure on food, poor populations in this island region usually choose locally cultivated tubers and fruits (such as cassava, taro and bananas) 57 , 58 with high intensities of land-use emissions 59 .

The numbers at the bottom of each bar represent the expenditure levels of regional expenditure deciles, ranging from the poorest (1) to the wealthiest (10). Food categories are shown in the colour legend. a , United States. b , Australia. c , Western Europe. d , Canada. e , Japan. f , Russia. g , Rest of East Asia. h , Eastern Europe. i , China. j , Rest of Oceania. k , NENA. l , Brazil. m , ROLAC. n , Rest of Southeast Asia. o , Indonesia. p , India. q , Rest of South Asia. r , Sub-Saharan Africa.

Emission changes from adopting the planetary health diet

To estimate the emission changes from a global diet shift, we build a hypothetical scenario by assuming that everyone in all countries adopts the planetary health diet ( Methods ). Results indicate that the global dietary emissions would decrease by 17% (1.94 (1.51–2.39) GtCO 2 e) compared with the 2019 level (details of the uncertainty ranges can be found in Supplementary Tables 11 and 12 ). The presently overconsuming groups (56.9% of the global population) would save 32.4% of global emissions through diet shifts, more than offsetting the 15.4% increase in global emissions from the presently underconsuming groups (43.1% of the global population) as a result of adopting healthier diets (Supplementary Table 13 ). National dietary emissions in 100 countries would decline by 2.88 GtCO 2 e, whereas the other 39 countries (mainly low- and lower-middle-income countries 46 in Sub-Saharan Africa and South Asia) would have an increase in emissions by 938 MtCO 2 e (Fig. 5a ; for detailed food categories see Supplementary Figs. 12 – 20 ).

a , Volume changes and percentage changes of national emissions for 139 countries/areas. b , Regional emission changes from different food categories. Abbreviations of 18 regions and the source of the base map are listed in Fig. 1 caption.

Countries would be affected differently regarding emission changes by adopting the planetary health diet, reflected in the percentage change in national emissions (Fig. 5a ). Uzbekistan (−74%), Australia (−70%), Qatar (−67%), Turkey (−65%) and Tajikistan (−64%) would see the largest percentage decrease. In comparison, most of the countries with an estimated considerable percentage increase are located in Sub-Saharan Africa and the Middle East, with the largest percentage increase from Iraq (+155%). Notably, with the increase in per capita GDP, the percentage change in overall dietary emissions of countries shows a shift from a positive to a negative trend, primarily led by changes in animal-based emissions (Supplementary Fig. 21 ).

Global emission reduction would be dominantly driven by red meat and grains (Fig. 5b ). The reduction in meat, eggs and fish would lead to 2.04 GtCO 2 e of emission reduction, of which 94% is driven by the decrease in red meat. China (22%), the United States (15%) and Brazil (14%) would be the largest contributors to emission reduction associated with a decrease in red meat consumption. A decline in grains would result in 914 MtCO 2 e of emission reduction, of which 56% would happen in Asia. A further 240 and 89 MtCO 2 e reduction in emissions would come from reduced sugars and tubers, respectively. However, increased proteins (legumes and nuts and dairy products), added fats and vegetables and fruits would partly offset the above-reduced emissions by 41%. Intake of legumes and nuts would increase in all regions, leading to a further 757 MtCO 2 e of emissions, whereas most of the emission increase related to added fats (largely vegetable oils) (279 Mt) and dairy products (143 Mt) would take place in Sub-Saharan Africa, China and other Asian countries. Global dietary emissions associated with vegetables and fruits would increase by 163 Mt, despite declines in China and Rest of Oceania.

The decline in per capita GHG footprints would be achieved primarily in wealthy consumer groups in high- and upper-middle-income countries, while increased footprints would occur mainly in poor groups in most countries (Fig. 6a ). Results show that the shifts of chief protein sources from animal-based to plant-based proteins according to the planetary health diet 12 would contribute the most to changes in footprints globally (Fig. 6b ). For example, in Australia, Brazil, Canada and the United States where diets are dominated by red meat and dairy products, the top and upper-middle expenditure groups would have notable reductions in footprints. However, most populations in South and Southeast Asia and Sub-Saharan Africa would have a considerable increase in footprints because of the present low levels of red meat intake. Meanwhile, the present intake of plant-based proteins in all countries is below the recommended level 25 . Footprints related to legumes and nuts would increase for most expenditure groups in all regions to meet nutrient demands. This increase is particularly substantial in Rest of Oceania, Brazil, Indonesia and Sub-Saharan Africa, where most of the consumed legumes and nuts are domestically produced with high land-use emission intensities 59 , 60 , assuming the present production and trade patterns remain unchanged.

a , Changes in GHG footprints from all types of food categories. The size of the bubble refers to the average total expenditure represented by the decile. b , Changes in GHG footprints from different food categories. The colours of bubbles in a and b indicate expenditure deciles ranging from the poorest in blue to the wealthiest in red and are comparable only within each region.

Discussion and conclusions

This study uncovers the extent of inequality of dietary emissions within countries based on detailed expenditure data 17 , 34 and underlines the dependence of dietary emissions on expenditure and income levels. Emissions aggregated at expenditure deciles may lose some fine-grained information from the 201 expenditure groups. For example, people from the lowest expenditure groups in affluent countries may experience malnutrition or even hunger, which is not adequately captured at a decile level. Nevertheless, the GF-Gini coefficient calculated from 201 groups provides an accurate reflection of emission inequality. Results show that affluent countries consume high-emission diets but show relatively lower levels of inequality, whereas many poor countries tend to have diets with lower emissions but higher levels of inequality.

The objective of the diet shift scenario is to assess the potential implications of emission mitigation of the food system resulting from changing consumer choices. Widespread diet shifts offer dual benefits by moving 43.1% of the global population out of underconsumption and mitigating 17% of global dietary emissions. The simulated changes in the volume of global emissions under the planetary health diet approximate the findings by ref. 26 (Supplementary Discussion 1 ). However, worldwide diet shifts require tailored policies targeted at regions, countries, expenditure groups and products instead of ‘one-size-fits-all’ policies.

We find that, compared to plant-based products, animal-based products, particularly red meat and dairy products, exhibit greater potential for reducing both emission volumes and emission disparities among different expenditure groups. Priorities lie in reducing the overconsumption of specific emission-intensive products in affluent countries (particularly the high-expenditure groups), such as beef in Australia and the United States, to achieve health 9 , 12 and climate benefits 25 , 26 , 28 . Incentives, such as implementing subsidies or taxation on environmental externalities through food or carbon pricing 61 , ecolabelling 62 and expanding the availability of less emission-intensive products (for instance, menu design for diverse vegetarian foods 63 ), can encourage consumers to make dietary changes. Moreover, a well-designed (primarily urban) food environment can reshape residents’ dietary patterns 35 and the parallel development of urban planning and infrastructure can alleviate the time and financial burdens of shifts to healthier diets 64 . However, in countries such as Mongolia, where diets heavily rely on red meat and dairy products because of their traditional nomadic lifestyle and limited accessibility of diverse foods, especially in rural areas 48 , diet shifts may not be feasible but there is a need to improve national nutritional education 48 .

Low-income countries face more severe challenges in reaching healthier diets. On the one hand, diet shifts require increased food consumption in these countries. For example, in Sub-Saharan Africa, the planetary health diet requires a 3.4-fold increase in dairy consumption for the entire population and a 69-fold increase for the poorest decile (Supplementary Fig. 22 ). However, Sub-Saharan Africa and South and Southeast Asia, which have experienced stagnating agriculture production efficiency for decades 8 , cannot produce domestically nor afford to import the food required for diet shifts 65 . It is crucial to enhance the production efficiency of feed and food crops through various measures such as crop and soil management techniques 8 , 66 and the introduction of high-yielding crop varieties and hybrids 67 , 68 . Moreover, increasing the proportions of nutrient-rich products in food imports 65 and reducing restrictive trade policies which tend to raise food prices 25 , 69 help to address this challenge. On the other hand, poor populations often opt for lower-cost, calorie-dense but less nutritionally beneficial foods. High cost and low affordability remain the largest barriers for these individuals to select healthier diets 44 , 54 , 70 , 71 . Others 44 found that >1.58 billion low-income populations worldwide cannot afford the cost of the planetary health diet. Therefore, policy efforts (for instance, pricing interventions 72 , technical assistance to reduce food production costs 73 and so on) should focus on making food more affordable and accessible, especially for lower expenditure groups 37 , 74 . However, studies indicate that lower food prices may decrease the income of agricultural households 75 , 76 , widen wealth gaps between individuals employed in food- and non-food sectors, especially in low-income agrarian countries and exacerbate rural poverty 1 , 77 . In this sense, policies aimed at promoting diet shifts should be deliberately and cautiously designed with vulnerable groups in mind to reduce inequality 37 , 61 .

Lastly, altered food demand due to diet shifts can induce notable structural adjustments within the global agri-food system. Although this study does not assess the feasibility of countries supplying sufficient food if the planetary health diet was adopted, results indicate that the composition of global food production would change considerably to adapt to the substantial changes in demand 8 , 25 , 77 . The diet shifts would necessitate the global supply (in calorie content) of red meat decrease by 81%, all sugars by 72%, tubers by 76% and grains by 50%, while that of legumes and nuts increase by 438%, added fats by 62% and vegetables and fruits by 28% (Supplementary Data 16 ). Research 77 , 78 confirms that changed food demand could cause fluctuating prices of agricultural products and land in global markets, triggering spillover effects between different food categories or to other non-food sectors (for example, stimulating biofuel production) and partly offsetting the benefits of diet shifts. Therefore, policy-making should focus on alleviating these effects. Incentives such as increased subsidies or tax breaks can generate new economic opportunities and motivations for industries that need to scale up production to meet the heightened demand for products (for example, plant-based proteins). By contrast, for emission-intensive food industries that need to downsize, measures such as gradual crop substitution 25 , 79 could be adopted to optimize production and reduce the costs of production transformations while safeguarding the interests of producers.

In this study, we first assess the GHG emissions from diets comprising 140 products 16 (Supplementary Table 14 ) in 139 countries or areas (we collectively use the term ‘country’ because most of them are individual countries) (Supplementary Data 1 ) in 2019 based on the global consumption-based emission inventory of detailed food products from ref. 16 . The inventory 16 provides data (in mass units) of GHG emissions (including CO 2 , CH 4 and N 2 O) generated during supply chain processes, including agricultural land use and land-use change (LULUC), agricultural activities and beyond-farm processes (excluding emissions from household and end of life) 4 . All emissions are allocated to final consumers of food products. The year 2019 (the latest year before the COVID-19 pandemic) is selected as a baseline year, which can reflect the level of present dietary intake without the interference of the pandemic 80 , 81 . Subsequently, dietary emissions from different expenditure groups are quantified by matching diets with the household-expenditure dataset 42 to reflect the differences and potential inequality of dietary emissions. Finally, to measure the magnitude of the emission impact of the global diet shift, we model the transition from diets in 2019 to the widespread adoption of the planetary health diet. The research framework of this study is shown in Supplementary Fig. 23 .

The following data sources are mainly used in this study. The consumption-based food emissions inventory 16 is based on data derived from the FAOSTAT 82 , comprising national emission accounts of supply chain processes and data on food trade and production. Data on food loss and waste throughout the global supply chain and at the household level as well as food supply data, all used for linking emissions with diets, are obtained from FAOSTAT 83 and previous research 25 , 39 . The household-expenditure data 41 are built on the basis of the WBGCD 42 and further refined and supplemented by consumer expenditure surveys from high-income countries 17 , 41 to bridge the dietary emissions with different expenditure groups. Detailed data sources used for calculation are provided in Supplementary Table 15 . Data processing, assumptions and uncertainties for all calculations are also given.

Dietary energy intake and emissions

Accounting of food consumption and supply chain emissions.

The estimation of the present dietary emissions and the emission changes for adopting the EAT-Lancet planetary health diet 12 is based on the accounting framework designed by ref. 16 . They assess global GHG emissions induced by the consumption of food products in 181 countries based on the physical trade flow approach 84 , 85 . Consumption-based GHG emissions along global supply chains, including local production and international trade, are calculated as follows 16 , 84 :

where E i,r refers to the consumption-based GHG emission of product i in country r . G i / P i represents the vector of direct emission intensity of product i from entire food supply chain processes, of which G i denotes total emissions generated from entire supply chain process of product i , P i is the production vector of product i . \({(I-{A}^{i})}^{-1}\) is the trade structure of product i , of which A i is the matrix of export shares and I is the identity matrix with the same dimension as matrix A i . DMI i refers to the vector of direct material input of product i and DMC i,r is the vector of domestic material consumption of product i in country r with values set to zero for other countries. The DMI of a country is defined as the total inputs of products and the DMC is defined as the amount of products consumed domestically. DMI equals DMC plus exports of products (or production plus imports). F i refers to the vector of total (or consumption-based) emission intensity of product i from food supply chain processes, that is, total emissions induced by per unit of domestic consumption of product i . All variables in equation ( 1 ) are in units of mass (metric tonnes).

Feed products are excluded from diets because emissions from feed crops have been allocated to livestock products that consume feed during production 16 . Food loss and waste (FLW) along supply chains and households are subtracted to quantify the net intake amount of food products from the household stage.

Dietary calorie conversions

We use the annual per capita food supply (FS) quantity of 140 food products from the supply utilization accounts of FAOSTAT 83 and population from the United Nations 86 to calculate the total supply amount of product i in country r (FS i,r , in the unit of mass):

where \({{\rm{FS}}}_{{\rm{per}}}^{i}\) denotes the per capita supply of product i per year and p r refers to the population in country r .

To be consistently matched with the DMC , the FS values should be limited within the coverage of the DMC and values that exceed this range are removed. At the same time, to aggregate food products into food categories and compare their nutritional contents with the reference level from the planetary health diet, we convert the quantity of food consumption or supply into calorie content using product-specific nutritive factors (calories per unit weight of product) 87 , 88 from FAO (Supplementary Table 14 ).

Subtracting food loss and waste at the household level

The food supply derived from FAOSTAT datasets does not exclude FLW that happens during household consumption 25 . FLW before dietary intake can be divided into two parts: the FLW during supply chain processes (including agricultural production, postharvest handling and storage, processing and packaging and distribution) as well as the FLW during the food preparation and supply for household consumption 39 , 40 . The food supply value provided by FAOSTAT only excludes FLW during supply chain processes. Therefore, we exclude household FLW using the method by ref. 25 to calculate the annual dietary intake for each product as follows:

where DI i,r and \({{\rm{DI}}}_{{\rm{per}}}^{i,r}\) refer to the national and per capita caloric intake amount of product i in country r each year, respectively. \({{\rm{FS}}}_{{\rm{energy}}}^{i,r}\) and \({{\rm{FS}}}_{{\rm{energy}\_per}}^{i,r}\) are the national and per capita supply quantity (in calorie content) of product i annually, respectively. Parameter \({f}_{{\rm{FLW}}}^{\;i,r}\) is the FLW factor in the household consumption stage 39 of food product i in country r . Others 39 provide regional FLW factors, expressed as the weight percentage of food that is lost or wasted at different stages of food production and consumption, for different food categories. As a result, household food waste is subtracted from the FS to obtain the dietary intake amount of each product. Detailed household FLW factors are shown in Supplementary Table 16 .

Quantifying dietary GHG emissions

Our equation ( 1 ) can be transformed into the following equation to calculate the total emission intensity of food calorie consumption:

where \({F}_{{\rm{energy}}}^{\,i,r}\) represents total emissions per unit of calorie content of product i in country r , \({{\rm{DMC}}}_{{\rm{energy}}}^{i,r}\) refers to total calorie content of product i consumed domestically in country r . Then, emissions from the dietary intake (without FLW) of product i in country r ( \({E}_{{\rm{intake}}}^{\,i,r}\) ) are calculated as follows:

Classification of food categories

The EAT-Lancet Commission report provides coverage of different food categories in the planetary health diet and their recommended caloric intake levels at 2,500 kcal for adults each day 12 (Supplementary Table 17 ). In this study, we classify 140 products into 13 aggregated food categories according to the planetary health diet 12 , including grains, tubers or starchy vegetables, vegetables, fruits, dairy products, red meat (beef, lamb and pork), chicken and other poultry, eggs, fish, legumes, nuts, added fats (both unsaturated and saturated oils) and all sugars. On the basis of the data availability of the FAOSTAT 4 , 82 , the food products in this study include both primary and processed products (primary and secondary food processing) which can be classified into specific food categories 16 . Ultraprocessed products that combine ingredients from several food categories, such as ice creams made from both dairy and sugar, are not considered. Detailed coverages of each food category and their mapping relationship with specific products are shown in Supplementary Table 18 .

Matching diets with the household-expenditure dataset

We explore the dietary emissions from consumers with different expenditure levels (defined as expenditure groups) using the household-expenditure dataset 41 for the year 2011. The dataset, containing 116 countries and almost 90% of the global population (Supplementary Table 19 ), is primarily based on the household survey microdata from the WBGCD 42 , supplemented by consumer expenditure surveys of national statistical offices from high-income countries such as the United States and European countries 17 , 41 . For every country in the dataset, 201 expenditure groups (grouped according to the per capita total expenditure of each group) and the corresponding population share are listed. The annual per capita expenditure of people in different expenditure groups ranges from <US$50 to ~US$1 million per year (expressed in 2011 Purchasing Power Parities, PPP) 31 , 34 . For each expenditure group, the expenditure for 33 different sectors of goods and services (including 11 food items) and the corresponding expenditure share in national consumption of each sector are provided 31 , 34 , 41 . For some affluent (or poor) countries that do not have a sufficient representative number of people at the bottom (or top) end of the expenditure spectrum, the population in the corresponding expenditure groups is empty. Expenditure shares of 11 food items are matched with the 140 products in this study (Supplementary Table 20 ). We calculate the dietary intake of different food products for each expenditure group in each country by multiplying the food expenditure share of groups with the total dietary intake amounts of food products of each country.

This study assumes that the amount of food consumption is proportionate to food expenditures and the purchasing price for the same product is unchanged across 201 groups ignoring higher prices for high-quality or luxury food items within the same food category. Although the assumption of an unchanged purchasing price is an unsolved limitation shared by similar studies using monetary expenditure data 31 , 34 , 41 , household expenditures on food can still effectively highlight the differences in food consumption and emissions across consumer groups with different affordability of, and spending on, food. We also assume that the proportion of food sources from local production and trade for the same food category remains constant across the 201 groups. In other words, the magnitude of dietary emissions is solely determined by the size and pattern of food expenditure of each group and the associated supply chains for each food consumption item.

For countries that are major food consumers (and emitters) but without data in WBGCD, expenditure shares from countries with similar development levels and eating habits and neighbouring geographical locations are used to calculate the distribution of their food expenditure. We finally select 201 expenditure groups in 139 countries/areas, covering 95% of the global population in 2019 (Supplementary Table 3 and Supplementary Data 3 ). Details for dealing with missing data are provided in Supplementary Table 7 . Countries or areas are then classified into 18 regions for comparison according to geographical locations (Supplementary Table 8 ). The WBGCD expenditure data from the year 2011 are adjusted to PPP in 2019 to represent the expenditure level of populations in figures. Results of emissions from 13 types of food categories of 201 expenditure groups at the national and regional levels are shown in Supplementary Data 8 , 10 and 11 .

Analysis of GF-Gini coefficients

Calculation of gf-gini coefficients.

This study uses the GF-Gini coefficient 33 , 89 , which is based on the well-known Gini coefficient 90 , to measure the inequality of GHG footprints from 201 expenditure groups within countries, regions and globally. The GF-Gini coefficient ranges from 0 to 1, indicating the emission distribution across expenditure groups changes from perfect equality to perfect inequality. The GF-Gini coefficient of each food category is calculated as 33 :

where Gini j indicate the GF-Gini coefficient of food category j (including product i , i  = 1, 2, 3, …, n ). Expenditure groups and their population are reordered in ascending order of per capita GHG footprint of food category j and m refers to the reordered number of groups ( m  = 1, 2, 3, …, 201). \({D}_{m}^{j}\) and \({Y}_{m}^{j}\) represent the proportions of population and GHG footprints (of food category j ) for each expenditure group, respectively. \({T}_{m}^{j}\) is the cumulative proportion of GHG footprints of each expenditure group. The results of national, regional and global GF-Gini coefficients are shown in Supplementary Tables 9 and 10 .

Regression analysis

We use the regression approach to examine the relationship between the national GF-Gini coefficients and the per capita GDP 91 , 92 of 139 countries/areas. The GF-Gini coefficient of each country is regarded as the dependent variable ( y ) and the national per capita GDP acts as the independent variable ( x ). Initially, locally weighted regression is applied to illustrate the trend lines within the scatterplot. Subsequently, we test different regression methods for validation based on the general trend. Ultimately, we found that logarithmic regression is the most fitting for dietary emissions of most food categories, particularly in the case of animal-based products. Thus, the logarithmic regression is applied.

Scenario of the planetary health diet

Scenario setting and assumptions.

To estimate the emission changes resulting from the transition from the 2019 diet to the global planetary health diet, we build a hypothetical scenario by assuming that individuals belonging to 201 different expenditure groups in all countries will all reach the reference intake level of 13 types of food categories 12 . First, we assume that the proportion of food sources from local production and trade in each country is unchanged, that is, emission changes from dietary shifts would be calculated on the basis of emissions from local production and imports accounting for emissions along global food supply chains, similar to studies by refs. 25 , 26 . At the same time, emission changes induced by decreased food consumption in countries following the planetary health diet, such as carbon uptake from agriculture abandonment 59 or emission increase from non-food biomass production in saved agricultural land 77 , are not considered in this study. Second, we assume that agricultural and food-related production technology, trade patterns and emission intensities of food supply chain processes remain unchanged during the diet transition. Third, fluctuations in food prices induced by altered food demand or the affordability of the planetary health diet for different consumer groups are not considered in this study.

Diet gaps for different food categories

The diet gap (DG) reflects gaps between present dietary intake and the planetary health diet 12 , 25 , as follows:

where \({{\rm{DG}}}_{{\rm{per}}}^{j,r}\) is defined as the percentage ratio of the present per capita caloric intake of food category j in country r each year ( \({{\rm{DI}}}_{{\rm{per}}}^{\,j,r}\) ) to the annual reference level ( \({{\rm{DI}}}_{{\rm{EAT}}\_{\rm{per}}}^{i}\) ). \({{\rm{DI}}}_{{\rm{EAT}\_day\_per}}^{\,j}\) is the recommended per capita caloric intake of food category j each day 12 (Supplementary Table 17 ). We assume a uniform annual calorie reference level for each food category across all populations in all countries. We allow flexibility in local diets by keeping the composition of each food category unchanged, requiring only that the calorie content reaches the reference level. According to the definition, present food intake is considered insufficient compared with reference levels when DG is <100%, while it is deemed excessive and should be reduced when DG is >100%. Daily per capita caloric intake of food categories from 201 expenditure groups of countries or regions are shown in Supplementary Data 12 and 13 . We calculate the DG for food categories of 201 expenditure groups at national and regional levels (Supplementary Data 14 and 15 ).

According to equation ( 1 ), the total emissions per unit of calorie content of food category j in country r ( \({F}_{{\rm{energy}}}^{\;j,r}\) ) can be calculated as:

where E j,r refers to the national emissions due to consumption of food category j in country r . Thus, emission changes for adopting the planetary health diet are calculated as follows:

where \(\Delta {E}_{{\rm{intake}}}^{\;j,r}\) represents the national emission changes of food category j in country r , \({E}_{{\rm{intake}}}^{\;j,r}\) is the national emissions from intake of food category j in country r . Changes in dietary emissions of food categories from 201 groups are shown in Supplementary Data 9 . The number of people with increased/decreased emissions from 201 groups is shown in Supplementary Data 19 .

Uncertainty analysis

We assess the uncertainty range of dietary emissions from different food products using a Monte Carlo approach, which simulates the uncertainties caused by activity data, emission factors and parameters in each emission process 16 , 59 , 93 . More details can be found in Supplementary Methods 1 .

Limitations

This study has the following limitations regarding data analysis and scenario setting.

In terms of data analysis, this study is limited by the data availability. First, we use regional household food loss and waste factors of aggregated food categories without more detailed product division at the national level because of a lack of data. There might also be differences between calculated and actual food intake amounts that are unable to be removed, such as animal bones or fruit skins 25 . Second, we use the consumer household-expenditure dataset based on WBGCD for the year 2011, which provides the most precise and detailed differentiation of consumer groups and their consumption patterns within countries so far. We assume that the shares in food expenditure and population for each expenditure group are the same as in 2011. Third, we assume that the composition of different products aggregated in one category consumed by expenditure groups is the same as the national consumption composition and there is no difference in the price of food products purchased by people from different expenditure groups. In addition, data for some populous high- or upper-middle-income countries are missing from the household-expenditure dataset. However, the countries are the world’s major food consumers and emitters, their emission changes due to diet shifts are important for the global food system. We use the expenditure shares of similar countries in the household-expenditure dataset to allocate the distributions of food expenditure in these countries.

In terms of scenario setting, we focus on the impact induced by changes in consumer choices without changing the proportion of food supply sources (domestic production and imports). We do not consider altering the proportions of supply sources and associated emissions in this study. However, future studies may explore the impacts of the production side and supply chains for diet shifts. Moreover, as we focus on the present emission inequality and mitigation potentials within the food system, we assume that the income and expenditure levels of expenditure groups remain unchanged. However, a shift in food supply may affect household income and subsequently alter the household food budgets, especially for populations employed in, or countries reliant on, food-related sectors. Additionally, as a result of data and model limitations, this study does not consider price fluctuations induced by food demand and subsequent changes in household affordability or spillover effects (between food categories or to non-food sectors). Future studies may combine assessment models incorporating elasticities to project the long-term feasibilities and consequences of diet shifts.

Reporting summary

Further information on research design is available in the Nature Portfolio Reporting Summary linked to this article.

Data availability

Data for LULUC, agricultural and beyond-farm emissions and data for physical food consumption are curated by the FAO and can be freely obtained from FAOSTAT 82 , available from ref. 16 . Data of food loss and waste rate are retrieved from FAOSTAT 82 and ref. 25 . The global household-expenditure data are obtained from the World Bank 42 and refs. 17 , 41 . Population data used in this study are obtained from World Population Prospects of the United Nations 86 . Data on per capita GDP in countries can be collected from the World Bank 91 and the International Monetary Fund 92 . Supplementary datasets are also available on Zenodo ( https://doi.org/10.5281/zenodo.11934909 ) 94 . Source data are provided with this paper.

Code availability

Data collection is performed in MATLAB and Microsoft Excel. Code developed for data processing in MATLAB and R in this study is available from Zenodo ( https://doi.org/10.5281/zenodo.11880402 ) 95 .

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Acknowledgements

This study was supported by the National Natural Science Foundation of China (grant nos 72243004, 32101315, 71904098). Y.S. and S.S. acknowledge support from the National Natural Science Foundation of China (grant no. 72243004). Yu Li acknowledges support from the National Natural Science Foundation of China (grant no. 32101315). P.H. acknowledges support from the National Natural Science Foundation of China under a Young Scholar Programme Grant (grant no. 71904098). Yanxian Li and Y.H. acknowledge the funding support by the China Scholarship Council PhD programme. We thank Y. Zhou for supporting visualization and J. Yan for assisting in writing and revising. For the purpose of open access, a CC BY public copyright license is applied to any author accepted manuscript arising from this submission.

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Yanxian Li, Y.S. and K.H. designed the research. Yanxian Li performed the analysis with support from P.H., Yu Li, Y.H. and S.S. on analytical approaches and visualization. Yanxian Li led the writing with efforts from P.H., Y.S., F.R. and K.H. Y.S. and K.H. supervised and coordinated the overall research. All co-authors reviewed and commented on the manuscript.

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Li, Y., He, P., Shan, Y. et al. Reducing climate change impacts from the global food system through diet shifts. Nat. Clim. Chang. (2024). https://doi.org/10.1038/s41558-024-02084-1

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DOI : https://doi.org/10.1038/s41558-024-02084-1

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