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From our Institute-wide Grand Challenge call, we identified six broad themes of climate research challenges: adaptation and resilience, carbon removal, climate policy, climate science, human impacts, and reducing emissions. These themes are not independent, and many of the letters of interest proposed tackling more than one research category. The breadth of these themes highlights the need for Climate Grand Challenge efforts from all disciplines.

Adaptation and Resilience

Research on how to adapt and lessen the negative impacts of climate change includes efforts to develop more resilient housing stock, electric power systems, transportation, agriculture, and other infrastructure. Other research focuses on more effective early warning systems and emergency planning measures. The development of scientific models with sufficient spatial and temporal resolution for reliable, quantitative predictions of future climate risks at local scale is an important objective. Countering the human health impacts of climate change and environmental degradation will also be essential.

Carbon Removal

Achieving and sustaining net-zero emissions will almost certainly require cost-effective negative emissions technologies for removing greenhouse gases from the atmosphere, as well as cost-effective CO2 capture technologies at power plants and industrial facilities, both constituting carbon removal . Advanced methods for long-term sequestration of CO2 are also under development, drawing on research on geological, biological, chemical, and oceanic processes as well as coastal ecosystems providing ‘sinks’ for atmospheric carbon.

Climate Policy

Public sector leaders need climate policy innovations that can accelerate the development, demonstration, and introduction of promising new technologies for climate change mitigation. New policies that can overcome behavioral, economic, social, and political barriers to the adoption of these technologies are also important, as are those that help communities to adapt to the climate changes that will occur. Policy approaches that benefit low-income and other marginalized communities are essential. Evidence-based research on the effectiveness of alternative policy approaches for achieving these goals, as well as for rapid scaling of technological innovations, can leverage the results of investing in these innovations and may also help to guide the direction of future innovations.

Climate Science

Climate science research focuses on strategically important scientific problems whose solution will enable advances in the measurement, modelling, and forecasting of climate risks and will thereby enhance our ability to weigh these risks against the costs of climate change mitigation and adaptation. These scientific advances are being facilitated by the development of novel, low-cost sensor devices and platforms for observing the atmosphere, oceans, glaciers, and ecological systems, and by applying recent advances in computation and data science to the data acquired from these new observational platforms. 

Human Impacts

Whereas the wealthiest societies have emitted the most greenhouse gas emissions per capita, the poorest societies are often at greatest risk from rising sea levels, increasingly powerful storms, wildfires, disease vectors, and disruptions to water and food supplies. Applying ecological, engineering, and urban resilience principles to social and community systems may also lead to procedural and distributive inequities. Research on human impacts focuses on measuring the distributional effects of climate-related phenomena and of the transition to low-carbon, more resilient communities, and is also focused on more inclusive and equitable strategies for climate action.

Reducing Emissions

Much of the global economy is still heavily dependent on carbon-emitting fossil fuels. Research on reducing emissions is focused on decarbonizing the global energy infrastructure, including tough-to-decarbonize sectors such as long-distance transportation, chemical refining, textile manufacturing, and cement and fertilizer production. Renewable fuels and advanced fission technologies will also feature in future low-carbon energy supply systems. Re-using construction materials and the circular economy are other key areas of research.

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A review of the global climate change impacts, adaptation, and sustainable mitigation measures

Kashif abbass.

1 School of Economics and Management, Nanjing University of Science and Technology, Nanjing, 210094 People’s Republic of China

Muhammad Zeeshan Qasim

2 Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Xiaolingwei 200, Nanjing, 210094 People’s Republic of China

Huaming Song

Muntasir murshed.

3 School of Business and Economics, North South University, Dhaka, 1229 Bangladesh

4 Department of Journalism, Media and Communications, Daffodil International University, Dhaka, Bangladesh

Haider Mahmood

5 Department of Finance, College of Business Administration, Prince Sattam Bin Abdulaziz University, 173, Alkharj, 11942 Saudi Arabia

Ijaz Younis

Associated data.

Data sources and relevant links are provided in the paper to access data.

Climate change is a long-lasting change in the weather arrays across tropics to polls. It is a global threat that has embarked on to put stress on various sectors. This study is aimed to conceptually engineer how climate variability is deteriorating the sustainability of diverse sectors worldwide. Specifically, the agricultural sector’s vulnerability is a globally concerning scenario, as sufficient production and food supplies are threatened due to irreversible weather fluctuations. In turn, it is challenging the global feeding patterns, particularly in countries with agriculture as an integral part of their economy and total productivity. Climate change has also put the integrity and survival of many species at stake due to shifts in optimum temperature ranges, thereby accelerating biodiversity loss by progressively changing the ecosystem structures. Climate variations increase the likelihood of particular food and waterborne and vector-borne diseases, and a recent example is a coronavirus pandemic. Climate change also accelerates the enigma of antimicrobial resistance, another threat to human health due to the increasing incidence of resistant pathogenic infections. Besides, the global tourism industry is devastated as climate change impacts unfavorable tourism spots. The methodology investigates hypothetical scenarios of climate variability and attempts to describe the quality of evidence to facilitate readers’ careful, critical engagement. Secondary data is used to identify sustainability issues such as environmental, social, and economic viability. To better understand the problem, gathered the information in this report from various media outlets, research agencies, policy papers, newspapers, and other sources. This review is a sectorial assessment of climate change mitigation and adaptation approaches worldwide in the aforementioned sectors and the associated economic costs. According to the findings, government involvement is necessary for the country’s long-term development through strict accountability of resources and regulations implemented in the past to generate cutting-edge climate policy. Therefore, mitigating the impacts of climate change must be of the utmost importance, and hence, this global threat requires global commitment to address its dreadful implications to ensure global sustenance.

Introduction

Worldwide observed and anticipated climatic changes for the twenty-first century and global warming are significant global changes that have been encountered during the past 65 years. Climate change (CC) is an inter-governmental complex challenge globally with its influence over various components of the ecological, environmental, socio-political, and socio-economic disciplines (Adger et al.  2005 ; Leal Filho et al.  2021 ; Feliciano et al.  2022 ). Climate change involves heightened temperatures across numerous worlds (Battisti and Naylor  2009 ; Schuurmans  2021 ; Weisheimer and Palmer  2005 ; Yadav et al.  2015 ). With the onset of the industrial revolution, the problem of earth climate was amplified manifold (Leppänen et al.  2014 ). It is reported that the immediate attention and due steps might increase the probability of overcoming its devastating impacts. It is not plausible to interpret the exact consequences of climate change (CC) on a sectoral basis (Izaguirre et al.  2021 ; Jurgilevich et al.  2017 ), which is evident by the emerging level of recognition plus the inclusion of climatic uncertainties at both local and national level of policymaking (Ayers et al.  2014 ).

Climate change is characterized based on the comprehensive long-haul temperature and precipitation trends and other components such as pressure and humidity level in the surrounding environment. Besides, the irregular weather patterns, retreating of global ice sheets, and the corresponding elevated sea level rise are among the most renowned international and domestic effects of climate change (Lipczynska-Kochany  2018 ; Michel et al.  2021 ; Murshed and Dao 2020 ). Before the industrial revolution, natural sources, including volcanoes, forest fires, and seismic activities, were regarded as the distinct sources of greenhouse gases (GHGs) such as CO 2 , CH 4 , N 2 O, and H 2 O into the atmosphere (Murshed et al. 2020 ; Hussain et al.  2020 ; Sovacool et al.  2021 ; Usman and Balsalobre-Lorente 2022 ; Murshed 2022 ). United Nations Framework Convention on Climate Change (UNFCCC) struck a major agreement to tackle climate change and accelerate and intensify the actions and investments required for a sustainable low-carbon future at Conference of the Parties (COP-21) in Paris on December 12, 2015. The Paris Agreement expands on the Convention by bringing all nations together for the first time in a single cause to undertake ambitious measures to prevent climate change and adapt to its impacts, with increased funding to assist developing countries in doing so. As so, it marks a turning point in the global climate fight. The core goal of the Paris Agreement is to improve the global response to the threat of climate change by keeping the global temperature rise this century well below 2 °C over pre-industrial levels and to pursue efforts to limit the temperature increase to 1.5° C (Sharma et al. 2020 ; Sharif et al. 2020 ; Chien et al. 2021 .

Furthermore, the agreement aspires to strengthen nations’ ability to deal with the effects of climate change and align financing flows with low GHG emissions and climate-resilient paths (Shahbaz et al. 2019 ; Anwar et al. 2021 ; Usman et al. 2022a ). To achieve these lofty goals, adequate financial resources must be mobilized and provided, as well as a new technology framework and expanded capacity building, allowing developing countries and the most vulnerable countries to act under their respective national objectives. The agreement also establishes a more transparent action and support mechanism. All Parties are required by the Paris Agreement to do their best through “nationally determined contributions” (NDCs) and to strengthen these efforts in the coming years (Balsalobre-Lorente et al. 2020 ). It includes obligations that all Parties regularly report on their emissions and implementation activities. A global stock-take will be conducted every five years to review collective progress toward the agreement’s goal and inform the Parties’ future individual actions. The Paris Agreement became available for signature on April 22, 2016, Earth Day, at the United Nations Headquarters in New York. On November 4, 2016, it went into effect 30 days after the so-called double threshold was met (ratification by 55 nations accounting for at least 55% of world emissions). More countries have ratified and continue to ratify the agreement since then, bringing 125 Parties in early 2017. To fully operationalize the Paris Agreement, a work program was initiated in Paris to define mechanisms, processes, and recommendations on a wide range of concerns (Murshed et al. 2021 ). Since 2016, Parties have collaborated in subsidiary bodies (APA, SBSTA, and SBI) and numerous formed entities. The Conference of the Parties functioning as the meeting of the Parties to the Paris Agreement (CMA) convened for the first time in November 2016 in Marrakesh in conjunction with COP22 and made its first two resolutions. The work plan is scheduled to be finished by 2018. Some mitigation and adaptation strategies to reduce the emission in the prospective of Paris agreement are following firstly, a long-term goal of keeping the increase in global average temperature to well below 2 °C above pre-industrial levels, secondly, to aim to limit the rise to 1.5 °C, since this would significantly reduce risks and the impacts of climate change, thirdly, on the need for global emissions to peak as soon as possible, recognizing that this will take longer for developing countries, lastly, to undertake rapid reductions after that under the best available science, to achieve a balance between emissions and removals in the second half of the century. On the other side, some adaptation strategies are; strengthening societies’ ability to deal with the effects of climate change and to continue & expand international assistance for developing nations’ adaptation.

However, anthropogenic activities are currently regarded as most accountable for CC (Murshed et al. 2022 ). Apart from the industrial revolution, other anthropogenic activities include excessive agricultural operations, which further involve the high use of fuel-based mechanization, burning of agricultural residues, burning fossil fuels, deforestation, national and domestic transportation sectors, etc. (Huang et al.  2016 ). Consequently, these anthropogenic activities lead to climatic catastrophes, damaging local and global infrastructure, human health, and total productivity. Energy consumption has mounted GHGs levels concerning warming temperatures as most of the energy production in developing countries comes from fossil fuels (Balsalobre-Lorente et al. 2022 ; Usman et al. 2022b ; Abbass et al. 2021a ; Ishikawa-Ishiwata and Furuya  2022 ).

This review aims to highlight the effects of climate change in a socio-scientific aspect by analyzing the existing literature on various sectorial pieces of evidence globally that influence the environment. Although this review provides a thorough examination of climate change and its severe affected sectors that pose a grave danger for global agriculture, biodiversity, health, economy, forestry, and tourism, and to purpose some practical prophylactic measures and mitigation strategies to be adapted as sound substitutes to survive from climate change (CC) impacts. The societal implications of irregular weather patterns and other effects of climate changes are discussed in detail. Some numerous sustainable mitigation measures and adaptation practices and techniques at the global level are discussed in this review with an in-depth focus on its economic, social, and environmental aspects. Methods of data collection section are included in the supplementary information.

Review methodology

Related study and its objectives.

Today, we live an ordinary life in the beautiful digital, globalized world where climate change has a decisive role. What happens in one country has a massive influence on geographically far apart countries, which points to the current crisis known as COVID-19 (Sarkar et al.  2021 ). The most dangerous disease like COVID-19 has affected the world’s climate changes and economic conditions (Abbass et al. 2022 ; Pirasteh-Anosheh et al.  2021 ). The purpose of the present study is to review the status of research on the subject, which is based on “Global Climate Change Impacts, adaptation, and sustainable mitigation measures” by systematically reviewing past published and unpublished research work. Furthermore, the current study seeks to comment on research on the same topic and suggest future research on the same topic. Specifically, the present study aims: The first one is, organize publications to make them easy and quick to find. Secondly, to explore issues in this area, propose an outline of research for future work. The third aim of the study is to synthesize the previous literature on climate change, various sectors, and their mitigation measurement. Lastly , classify the articles according to the different methods and procedures that have been adopted.

Review methodology for reviewers

This review-based article followed systematic literature review techniques that have proved the literature review as a rigorous framework (Benita  2021 ; Tranfield et al.  2003 ). Moreover, we illustrate in Fig.  1 the search method that we have started for this research. First, finalized the research theme to search literature (Cooper et al.  2018 ). Second, used numerous research databases to search related articles and download from the database (Web of Science, Google Scholar, Scopus Index Journals, Emerald, Elsevier Science Direct, Springer, and Sciverse). We focused on various articles, with research articles, feedback pieces, short notes, debates, and review articles published in scholarly journals. Reports used to search for multiple keywords such as “Climate Change,” “Mitigation and Adaptation,” “Department of Agriculture and Human Health,” “Department of Biodiversity and Forestry,” etc.; in summary, keyword list and full text have been made. Initially, the search for keywords yielded a large amount of literature.

Methodology search for finalized articles for investigations.

Source : constructed by authors

Since 2020, it has been impossible to review all the articles found; some restrictions have been set for the literature exhibition. The study searched 95 articles on a different database mentioned above based on the nature of the study. It excluded 40 irrelevant papers due to copied from a previous search after readings tiles, abstract and full pieces. The criteria for inclusion were: (i) articles focused on “Global Climate Change Impacts, adaptation, and sustainable mitigation measures,” and (ii) the search key terms related to study requirements. The complete procedure yielded 55 articles for our study. We repeat our search on the “Web of Science and Google Scholars” database to enhance the search results and check the referenced articles.

In this study, 55 articles are reviewed systematically and analyzed for research topics and other aspects, such as the methods, contexts, and theories used in these studies. Furthermore, this study analyzes closely related areas to provide unique research opportunities in the future. The study also discussed future direction opportunities and research questions by understanding the research findings climate changes and other affected sectors. The reviewed paper framework analysis process is outlined in Fig.  2 .

Framework of the analysis Process.

Natural disasters and climate change’s socio-economic consequences

Natural and environmental disasters can be highly variable from year to year; some years pass with very few deaths before a significant disaster event claims many lives (Symanski et al.  2021 ). Approximately 60,000 people globally died from natural disasters each year on average over the past decade (Ritchie and Roser  2014 ; Wiranata and Simbolon  2021 ). So, according to the report, around 0.1% of global deaths. Annual variability in the number and share of deaths from natural disasters in recent decades are shown in Fig.  3 . The number of fatalities can be meager—sometimes less than 10,000, and as few as 0.01% of all deaths. But shock events have a devastating impact: the 1983–1985 famine and drought in Ethiopia; the 2004 Indian Ocean earthquake and tsunami; Cyclone Nargis, which struck Myanmar in 2008; and the 2010 Port-au-Prince earthquake in Haiti and now recent example is COVID-19 pandemic (Erman et al.  2021 ). These events pushed global disaster deaths to over 200,000—more than 0.4% of deaths in these years. Low-frequency, high-impact events such as earthquakes and tsunamis are not preventable, but such high losses of human life are. Historical evidence shows that earlier disaster detection, more robust infrastructure, emergency preparedness, and response programmers have substantially reduced disaster deaths worldwide. Low-income is also the most vulnerable to disasters; improving living conditions, facilities, and response services in these areas would be critical in reducing natural disaster deaths in the coming decades.

Global deaths from natural disasters, 1978 to 2020.

Source EMDAT ( 2020 )

The interior regions of the continent are likely to be impacted by rising temperatures (Dimri et al.  2018 ; Goes et al.  2020 ; Mannig et al.  2018 ; Schuurmans  2021 ). Weather patterns change due to the shortage of natural resources (water), increase in glacier melting, and rising mercury are likely to cause extinction to many planted species (Gampe et al.  2016 ; Mihiretu et al.  2021 ; Shaffril et al.  2018 ).On the other hand, the coastal ecosystem is on the verge of devastation (Perera et al.  2018 ; Phillips  2018 ). The temperature rises, insect disease outbreaks, health-related problems, and seasonal and lifestyle changes are persistent, with a strong probability of these patterns continuing in the future (Abbass et al. 2021c ; Hussain et al.  2018 ). At the global level, a shortage of good infrastructure and insufficient adaptive capacity are hammering the most (IPCC  2013 ). In addition to the above concerns, a lack of environmental education and knowledge, outdated consumer behavior, a scarcity of incentives, a lack of legislation, and the government’s lack of commitment to climate change contribute to the general public’s concerns. By 2050, a 2 to 3% rise in mercury and a drastic shift in rainfall patterns may have serious consequences (Huang et al. 2022 ; Gorst et al.  2018 ). Natural and environmental calamities caused huge losses globally, such as decreased agriculture outputs, rehabilitation of the system, and rebuilding necessary technologies (Ali and Erenstein  2017 ; Ramankutty et al.  2018 ; Yu et al.  2021 ) (Table ​ (Table1). 1 ). Furthermore, in the last 3 or 4 years, the world has been plagued by smog-related eye and skin diseases, as well as a rise in road accidents due to poor visibility.

Main natural danger statistics for 1985–2020 at the global level

Source: EM-DAT ( 2020 )

Climate change and agriculture

Global agriculture is the ultimate sector responsible for 30–40% of all greenhouse emissions, which makes it a leading industry predominantly contributing to climate warming and significantly impacted by it (Grieg; Mishra et al.  2021 ; Ortiz et al.  2021 ; Thornton and Lipper  2014 ). Numerous agro-environmental and climatic factors that have a dominant influence on agriculture productivity (Pautasso et al.  2012 ) are significantly impacted in response to precipitation extremes including floods, forest fires, and droughts (Huang  2004 ). Besides, the immense dependency on exhaustible resources also fuels the fire and leads global agriculture to become prone to devastation. Godfray et al. ( 2010 ) mentioned that decline in agriculture challenges the farmer’s quality of life and thus a significant factor to poverty as the food and water supplies are critically impacted by CC (Ortiz et al.  2021 ; Rosenzweig et al.  2014 ). As an essential part of the economic systems, especially in developing countries, agricultural systems affect the overall economy and potentially the well-being of households (Schlenker and Roberts  2009 ). According to the report published by the Intergovernmental Panel on Climate Change (IPCC), atmospheric concentrations of greenhouse gases, i.e., CH 4, CO 2 , and N 2 O, are increased in the air to extraordinary levels over the last few centuries (Usman and Makhdum 2021 ; Stocker et al.  2013 ). Climate change is the composite outcome of two different factors. The first is the natural causes, and the second is the anthropogenic actions (Karami 2012 ). It is also forecasted that the world may experience a typical rise in temperature stretching from 1 to 3.7 °C at the end of this century (Pachauri et al. 2014 ). The world’s crop production is also highly vulnerable to these global temperature-changing trends as raised temperatures will pose severe negative impacts on crop growth (Reidsma et al. 2009 ). Some of the recent modeling about the fate of global agriculture is briefly described below.

Decline in cereal productivity

Crop productivity will also be affected dramatically in the next few decades due to variations in integral abiotic factors such as temperature, solar radiation, precipitation, and CO 2 . These all factors are included in various regulatory instruments like progress and growth, weather-tempted changes, pest invasions (Cammell and Knight 1992 ), accompanying disease snags (Fand et al. 2012 ), water supplies (Panda et al. 2003 ), high prices of agro-products in world’s agriculture industry, and preeminent quantity of fertilizer consumption. Lobell and field ( 2007 ) claimed that from 1962 to 2002, wheat crop output had condensed significantly due to rising temperatures. Therefore, during 1980–2011, the common wheat productivity trends endorsed extreme temperature events confirmed by Gourdji et al. ( 2013 ) around South Asia, South America, and Central Asia. Various other studies (Asseng, Cao, Zhang, and Ludwig 2009 ; Asseng et al. 2013 ; García et al. 2015 ; Ortiz et al. 2021 ) also proved that wheat output is negatively affected by the rising temperatures and also caused adverse effects on biomass productivity (Calderini et al. 1999 ; Sadras and Slafer 2012 ). Hereafter, the rice crop is also influenced by the high temperatures at night. These difficulties will worsen because the temperature will be rising further in the future owing to CC (Tebaldi et al. 2006 ). Another research conducted in China revealed that a 4.6% of rice production per 1 °C has happened connected with the advancement in night temperatures (Tao et al. 2006 ). Moreover, the average night temperature growth also affected rice indicia cultivar’s output pragmatically during 25 years in the Philippines (Peng et al. 2004 ). It is anticipated that the increase in world average temperature will also cause a substantial reduction in yield (Hatfield et al. 2011 ; Lobell and Gourdji 2012 ). In the southern hemisphere, Parry et al. ( 2007 ) noted a rise of 1–4 °C in average daily temperatures at the end of spring season unti the middle of summers, and this raised temperature reduced crop output by cutting down the time length for phenophases eventually reduce the yield (Hatfield and Prueger 2015 ; R. Ortiz 2008 ). Also, world climate models have recommended that humid and subtropical regions expect to be plentiful prey to the upcoming heat strokes (Battisti and Naylor 2009 ). Grain production is the amalgamation of two constituents: the average weight and the grain output/m 2 , however, in crop production. Crop output is mainly accredited to the grain quantity (Araus et al. 2008 ; Gambín and Borrás 2010 ). In the times of grain set, yield resources are mainly strewn between hitherto defined components, i.e., grain usual weight and grain output, which presents a trade-off between them (Gambín and Borrás 2010 ) beside disparities in per grain integration (B. L. Gambín et al. 2006 ). In addition to this, the maize crop is also susceptible to raised temperatures, principally in the flowering stage (Edreira and Otegui 2013 ). In reality, the lower grain number is associated with insufficient acclimatization due to intense photosynthesis and higher respiration and the high-temperature effect on the reproduction phenomena (Edreira and Otegui 2013 ). During the flowering phase, maize visible to heat (30–36 °C) seemed less anthesis-silking intermissions (Edreira et al. 2011 ). Another research by Dupuis and Dumas ( 1990 ) proved that a drop in spikelet when directly visible to high temperatures above 35 °C in vitro pollination. Abnormalities in kernel number claimed by Vega et al. ( 2001 ) is related to conceded plant development during a flowering phase that is linked with the active ear growth phase and categorized as a critical phase for approximation of kernel number during silking (Otegui and Bonhomme 1998 ).

The retort of rice output to high temperature presents disparities in flowering patterns, and seed set lessens and lessens grain weight (Qasim et al. 2020 ; Qasim, Hammad, Maqsood, Tariq, & Chawla). During the daytime, heat directly impacts flowers which lessens the thesis period and quickens the earlier peak flowering (Tao et al. 2006 ). Antagonistic effect of higher daytime temperature d on pollen sprouting proposed seed set decay, whereas, seed set was lengthily reduced than could be explicated by pollen growing at high temperatures 40◦C (Matsui et al. 2001 ).

The decline in wheat output is linked with higher temperatures, confirmed in numerous studies (Semenov 2009 ; Stone and Nicolas 1994 ). High temperatures fast-track the arrangements of plant expansion (Blum et al. 2001 ), diminution photosynthetic process (Salvucci and Crafts‐Brandner 2004 ), and also considerably affect the reproductive operations (Farooq et al. 2011 ).

The destructive impacts of CC induced weather extremes to deteriorate the integrity of crops (Chaudhary et al. 2011 ), e.g., Spartan cold and extreme fog cause falling and discoloration of betel leaves (Rosenzweig et al. 2001 ), giving them a somehow reddish appearance, squeezing of lemon leaves (Pautasso et al. 2012 ), as well as root rot of pineapple, have reported (Vedwan and Rhoades 2001 ). Henceforth, in tackling the disruptive effects of CC, several short-term and long-term management approaches are the crucial need of time (Fig.  4 ). Moreover, various studies (Chaudhary et al. 2011 ; Patz et al. 2005 ; Pautasso et al. 2012 ) have demonstrated adapting trends such as ameliorating crop diversity can yield better adaptability towards CC.

Schematic description of potential impacts of climate change on the agriculture sector and the appropriate mitigation and adaptation measures to overcome its impact.

Climate change impacts on biodiversity

Global biodiversity is among the severe victims of CC because it is the fastest emerging cause of species loss. Studies demonstrated that the massive scale species dynamics are considerably associated with diverse climatic events (Abraham and Chain 1988 ; Manes et al. 2021 ; A. M. D. Ortiz et al. 2021 ). Both the pace and magnitude of CC are altering the compatible habitat ranges for living entities of marine, freshwater, and terrestrial regions. Alterations in general climate regimes influence the integrity of ecosystems in numerous ways, such as variation in the relative abundance of species, range shifts, changes in activity timing, and microhabitat use (Bates et al. 2014 ). The geographic distribution of any species often depends upon its ability to tolerate environmental stresses, biological interactions, and dispersal constraints. Hence, instead of the CC, the local species must only accept, adapt, move, or face extinction (Berg et al. 2010 ). So, the best performer species have a better survival capacity for adjusting to new ecosystems or a decreased perseverance to survive where they are already situated (Bates et al. 2014 ). An important aspect here is the inadequate habitat connectivity and access to microclimates, also crucial in raising the exposure to climate warming and extreme heatwave episodes. For example, the carbon sequestration rates are undergoing fluctuations due to climate-driven expansion in the range of global mangroves (Cavanaugh et al. 2014 ).

Similarly, the loss of kelp-forest ecosystems in various regions and its occupancy by the seaweed turfs has set the track for elevated herbivory by the high influx of tropical fish populations. Not only this, the increased water temperatures have exacerbated the conditions far away from the physiological tolerance level of the kelp communities (Vergés et al. 2016 ; Wernberg et al. 2016 ). Another pertinent danger is the devastation of keystone species, which even has more pervasive effects on the entire communities in that habitat (Zarnetske et al. 2012 ). It is particularly important as CC does not specify specific populations or communities. Eventually, this CC-induced redistribution of species may deteriorate carbon storage and the net ecosystem productivity (Weed et al. 2013 ). Among the typical disruptions, the prominent ones include impacts on marine and terrestrial productivity, marine community assembly, and the extended invasion of toxic cyanobacteria bloom (Fossheim et al. 2015 ).

The CC-impacted species extinction is widely reported in the literature (Beesley et al. 2019 ; Urban 2015 ), and the predictions of demise until the twenty-first century are dreadful (Abbass et al. 2019 ; Pereira et al. 2013 ). In a few cases, northward shifting of species may not be formidable as it allows mountain-dwelling species to find optimum climates. However, the migrant species may be trapped in isolated and incompatible habitats due to losing topography and range (Dullinger et al. 2012 ). For example, a study indicated that the American pika has been extirpated or intensely diminished in some regions, primarily attributed to the CC-impacted extinction or at least local extirpation (Stewart et al. 2015 ). Besides, the anticipation of persistent responses to the impacts of CC often requires data records of several decades to rigorously analyze the critical pre and post CC patterns at species and ecosystem levels (Manes et al. 2021 ; Testa et al. 2018 ).

Nonetheless, the availability of such long-term data records is rare; hence, attempts are needed to focus on these profound aspects. Biodiversity is also vulnerable to the other associated impacts of CC, such as rising temperatures, droughts, and certain invasive pest species. For instance, a study revealed the changes in the composition of plankton communities attributed to rising temperatures. Henceforth, alterations in such aquatic producer communities, i.e., diatoms and calcareous plants, can ultimately lead to variation in the recycling of biological carbon. Moreover, such changes are characterized as a potential contributor to CO 2 differences between the Pleistocene glacial and interglacial periods (Kohfeld et al. 2005 ).

Climate change implications on human health

It is an understood corporality that human health is a significant victim of CC (Costello et al. 2009 ). According to the WHO, CC might be responsible for 250,000 additional deaths per year during 2030–2050 (Watts et al. 2015 ). These deaths are attributed to extreme weather-induced mortality and morbidity and the global expansion of vector-borne diseases (Lemery et al. 2021; Yang and Usman 2021 ; Meierrieks 2021 ; UNEP 2017 ). Here, some of the emerging health issues pertinent to this global problem are briefly described.

Climate change and antimicrobial resistance with corresponding economic costs

Antimicrobial resistance (AMR) is an up-surging complex global health challenge (Garner et al. 2019 ; Lemery et al. 2021 ). Health professionals across the globe are extremely worried due to this phenomenon that has critical potential to reverse almost all the progress that has been achieved so far in the health discipline (Gosling and Arnell 2016 ). A massive amount of antibiotics is produced by many pharmaceutical industries worldwide, and the pathogenic microorganisms are gradually developing resistance to them, which can be comprehended how strongly this aspect can shake the foundations of national and global economies (UNEP 2017 ). This statement is supported by the fact that AMR is not developing in a particular region or country. Instead, it is flourishing in every continent of the world (WHO 2018 ). This plague is heavily pushing humanity to the post-antibiotic era, in which currently antibiotic-susceptible pathogens will once again lead to certain endemics and pandemics after being resistant(WHO 2018 ). Undesirably, if this statement would become a factuality, there might emerge certain risks in undertaking sophisticated interventions such as chemotherapy, joint replacement cases, and organ transplantation (Su et al. 2018 ). Presently, the amplification of drug resistance cases has made common illnesses like pneumonia, post-surgical infections, HIV/AIDS, tuberculosis, malaria, etc., too difficult and costly to be treated or cure well (WHO 2018 ). From a simple example, it can be assumed how easily antibiotic-resistant strains can be transmitted from one person to another and ultimately travel across the boundaries (Berendonk et al. 2015 ). Talking about the second- and third-generation classes of antibiotics, e.g., most renowned generations of cephalosporin antibiotics that are more expensive, broad-spectrum, more toxic, and usually require more extended periods whenever prescribed to patients (Lemery et al. 2021 ; Pärnänen et al. 2019 ). This scenario has also revealed that the abundance of resistant strains of pathogens was also higher in the Southern part (WHO 2018 ). As southern parts are generally warmer than their counterparts, it is evident from this example how CC-induced global warming can augment the spread of antibiotic-resistant strains within the biosphere, eventually putting additional economic burden in the face of developing new and costlier antibiotics. The ARG exchange to susceptible bacteria through one of the potential mechanisms, transformation, transduction, and conjugation; Selection pressure can be caused by certain antibiotics, metals or pesticides, etc., as shown in Fig.  5 .

A typical interaction between the susceptible and resistant strains.

Source: Elsayed et al. ( 2021 ); Karkman et al. ( 2018 )

Certain studies highlighted that conventional urban wastewater treatment plants are typical hotspots where most bacterial strains exchange genetic material through horizontal gene transfer (Fig.  5 ). Although at present, the extent of risks associated with the antibiotic resistance found in wastewater is complicated; environmental scientists and engineers have particular concerns about the potential impacts of these antibiotic resistance genes on human health (Ashbolt 2015 ). At most undesirable and worst case, these antibiotic-resistant genes containing bacteria can make their way to enter into the environment (Pruden et al. 2013 ), irrigation water used for crops and public water supplies and ultimately become a part of food chains and food webs (Ma et al. 2019 ; D. Wu et al. 2019 ). This problem has been reported manifold in several countries (Hendriksen et al. 2019 ), where wastewater as a means of irrigated water is quite common.

Climate change and vector borne-diseases

Temperature is a fundamental factor for the sustenance of living entities regardless of an ecosystem. So, a specific living being, especially a pathogen, requires a sophisticated temperature range to exist on earth. The second essential component of CC is precipitation, which also impacts numerous infectious agents’ transport and dissemination patterns. Global rising temperature is a significant cause of many species extinction. On the one hand, this changing environmental temperature may be causing species extinction, and on the other, this warming temperature might favor the thriving of some new organisms. Here, it was evident that some pathogens may also upraise once non-evident or reported (Patz et al. 2000 ). This concept can be exemplified through certain pathogenic strains of microorganisms that how the likelihood of various diseases increases in response to climate warming-induced environmental changes (Table ​ (Table2 2 ).

Examples of how various environmental changes affect various infectious diseases in humans

Source: Aron and Patz ( 2001 )

A recent example is an outburst of coronavirus (COVID-19) in the Republic of China, causing pneumonia and severe acute respiratory complications (Cui et al. 2021 ; Song et al. 2021 ). The large family of viruses is harbored in numerous animals, bats, and snakes in particular (livescience.com) with the subsequent transfer into human beings. Hence, it is worth noting that the thriving of numerous vectors involved in spreading various diseases is influenced by Climate change (Ogden 2018 ; Santos et al. 2021 ).

Psychological impacts of climate change

Climate change (CC) is responsible for the rapid dissemination and exaggeration of certain epidemics and pandemics. In addition to the vast apparent impacts of climate change on health, forestry, agriculture, etc., it may also have psychological implications on vulnerable societies. It can be exemplified through the recent outburst of (COVID-19) in various countries around the world (Pal 2021 ). Besides, the victims of this viral infection have made healthy beings scarier and terrified. In the wake of such epidemics, people with common colds or fever are also frightened and must pass specific regulatory protocols. Living in such situations continuously terrifies the public and makes the stress familiar, which eventually makes them psychologically weak (npr.org).

CC boosts the extent of anxiety, distress, and other issues in public, pushing them to develop various mental-related problems. Besides, frequent exposure to extreme climatic catastrophes such as geological disasters also imprints post-traumatic disorder, and their ubiquitous occurrence paves the way to developing chronic psychological dysfunction. Moreover, repetitive listening from media also causes an increase in the person’s stress level (Association 2020 ). Similarly, communities living in flood-prone areas constantly live in extreme fear of drowning and die by floods. In addition to human lives, the flood-induced destruction of physical infrastructure is a specific reason for putting pressure on these communities (Ogden 2018 ). For instance, Ogden ( 2018 ) comprehensively denoted that Katrina’s Hurricane augmented the mental health issues in the victim communities.

Climate change impacts on the forestry sector

Forests are the global regulators of the world’s climate (FAO 2018 ) and have an indispensable role in regulating global carbon and nitrogen cycles (Rehman et al. 2021 ; Reichstein and Carvalhais 2019 ). Hence, disturbances in forest ecology affect the micro and macro-climates (Ellison et al. 2017 ). Climate warming, in return, has profound impacts on the growth and productivity of transboundary forests by influencing the temperature and precipitation patterns, etc. As CC induces specific changes in the typical structure and functions of ecosystems (Zhang et al. 2017 ) as well impacts forest health, climate change also has several devastating consequences such as forest fires, droughts, pest outbreaks (EPA 2018 ), and last but not the least is the livelihoods of forest-dependent communities. The rising frequency and intensity of another CC product, i.e., droughts, pose plenty of challenges to the well-being of global forests (Diffenbaugh et al. 2017 ), which is further projected to increase soon (Hartmann et al. 2018 ; Lehner et al. 2017 ; Rehman et al. 2021 ). Hence, CC induces storms, with more significant impacts also put extra pressure on the survival of the global forests (Martínez-Alvarado et al. 2018 ), significantly since their influences are augmented during higher winter precipitations with corresponding wetter soils causing weak root anchorage of trees (Brázdil et al. 2018 ). Surging temperature regimes causes alterations in usual precipitation patterns, which is a significant hurdle for the survival of temperate forests (Allen et al. 2010 ; Flannigan et al. 2013 ), letting them encounter severe stress and disturbances which adversely affects the local tree species (Hubbart et al. 2016 ; Millar and Stephenson 2015 ; Rehman et al. 2021 ).

Climate change impacts on forest-dependent communities

Forests are the fundamental livelihood resource for about 1.6 billion people worldwide; out of them, 350 million are distinguished with relatively higher reliance (Bank 2008 ). Agro-forestry-dependent communities comprise 1.2 billion, and 60 million indigenous people solely rely on forests and their products to sustain their lives (Sunderlin et al. 2005 ). For example, in the entire African continent, more than 2/3rd of inhabitants depend on forest resources and woodlands for their alimonies, e.g., food, fuelwood and grazing (Wasiq and Ahmad 2004 ). The livings of these people are more intensely affected by the climatic disruptions making their lives harder (Brown et al. 2014 ). On the one hand, forest communities are incredibly vulnerable to CC due to their livelihoods, cultural and spiritual ties as well as socio-ecological connections, and on the other, they are not familiar with the term “climate change.” (Rahman and Alam 2016 ). Among the destructive impacts of temperature and rainfall, disruption of the agroforestry crops with resultant downscale growth and yield (Macchi et al. 2008 ). Cruz ( 2015 ) ascribed that forest-dependent smallholder farmers in the Philippines face the enigma of delayed fruiting, more severe damages by insect and pest incidences due to unfavorable temperature regimes, and changed rainfall patterns.

Among these series of challenges to forest communities, their well-being is also distinctly vulnerable to CC. Though the detailed climate change impacts on human health have been comprehensively mentioned in the previous section, some studies have listed a few more devastating effects on the prosperity of forest-dependent communities. For instance, the Himalayan people have been experiencing frequent skin-borne diseases such as malaria and other skin diseases due to increasing mosquitoes, wild boar as well, and new wasps species, particularly in higher altitudes that were almost non-existent before last 5–10 years (Xu et al. 2008 ). Similarly, people living at high altitudes in Bangladesh have experienced frequent mosquito-borne calamities (Fardous; Sharma 2012 ). In addition, the pace of other waterborne diseases such as infectious diarrhea, cholera, pathogenic induced abdominal complications and dengue has also been boosted in other distinguished regions of Bangladesh (Cell 2009 ; Gunter et al. 2008 ).

Pest outbreak

Upscaling hotter climate may positively affect the mobile organisms with shorter generation times because they can scurry from harsh conditions than the immobile species (Fettig et al. 2013 ; Schoene and Bernier 2012 ) and are also relatively more capable of adapting to new environments (Jactel et al. 2019 ). It reveals that insects adapt quickly to global warming due to their mobility advantages. Due to past outbreaks, the trees (forests) are relatively more susceptible victims (Kurz et al. 2008 ). Before CC, the influence of factors mentioned earlier, i.e., droughts and storms, was existent and made the forests susceptible to insect pest interventions; however, the global forests remain steadfast, assiduous, and green (Jactel et al. 2019 ). The typical reasons could be the insect herbivores were regulated by several tree defenses and pressures of predation (Wilkinson and Sherratt 2016 ). As climate greatly influences these phenomena, the global forests cannot be so sedulous against such challenges (Jactel et al. 2019 ). Table ​ Table3 3 demonstrates some of the particular considerations with practical examples that are essential while mitigating the impacts of CC in the forestry sector.

Essential considerations while mitigating the climate change impacts on the forestry sector

Source : Fischer ( 2019 )

Climate change impacts on tourism

Tourism is a commercial activity that has roots in multi-dimensions and an efficient tool with adequate job generation potential, revenue creation, earning of spectacular foreign exchange, enhancement in cross-cultural promulgation and cooperation, a business tool for entrepreneurs and eventually for the country’s national development (Arshad et al. 2018 ; Scott 2021 ). Among a plethora of other disciplines, the tourism industry is also a distinct victim of climate warming (Gössling et al. 2012 ; Hall et al. 2015 ) as the climate is among the essential resources that enable tourism in particular regions as most preferred locations. Different places at different times of the year attract tourists both within and across the countries depending upon the feasibility and compatibility of particular weather patterns. Hence, the massive variations in these weather patterns resulting from CC will eventually lead to monumental challenges to the local economy in that specific area’s particular and national economy (Bujosa et al. 2015 ). For instance, the Intergovernmental Panel on Climate Change (IPCC) report demonstrated that the global tourism industry had faced a considerable decline in the duration of ski season, including the loss of some ski areas and the dramatic shifts in tourist destinations’ climate warming.

Furthermore, different studies (Neuvonen et al. 2015 ; Scott et al. 2004 ) indicated that various currently perfect tourist spots, e.g., coastal areas, splendid islands, and ski resorts, will suffer consequences of CC. It is also worth noting that the quality and potential of administrative management potential to cope with the influence of CC on the tourism industry is of crucial significance, which renders specific strengths of resiliency to numerous destinations to withstand against it (Füssel and Hildén 2014 ). Similarly, in the partial or complete absence of adequate socio-economic and socio-political capital, the high-demanding tourist sites scurry towards the verge of vulnerability. The susceptibility of tourism is based on different components such as the extent of exposure, sensitivity, life-supporting sectors, and capacity assessment factors (Füssel and Hildén 2014 ). It is obvious corporality that sectors such as health, food, ecosystems, human habitat, infrastructure, water availability, and the accessibility of a particular region are prone to CC. Henceforth, the sensitivity of these critical sectors to CC and, in return, the adaptive measures are a hallmark in determining the composite vulnerability of climate warming (Ionescu et al. 2009 ).

Moreover, the dependence on imported food items, poor hygienic conditions, and inadequate health professionals are dominant aspects affecting the local terrestrial and aquatic biodiversity. Meanwhile, the greater dependency on ecosystem services and its products also makes a destination more fragile to become a prey of CC (Rizvi et al. 2015 ). Some significant non-climatic factors are important indicators of a particular ecosystem’s typical health and functioning, e.g., resource richness and abundance portray the picture of ecosystem stability. Similarly, the species abundance is also a productive tool that ensures that the ecosystem has a higher buffering capacity, which is terrific in terms of resiliency (Roscher et al. 2013 ).

Climate change impacts on the economic sector

Climate plays a significant role in overall productivity and economic growth. Due to its increasingly global existence and its effect on economic growth, CC has become one of the major concerns of both local and international environmental policymakers (Ferreira et al. 2020 ; Gleditsch 2021 ; Abbass et al. 2021b ; Lamperti et al. 2021 ). The adverse effects of CC on the overall productivity factor of the agricultural sector are therefore significant for understanding the creation of local adaptation policies and the composition of productive climate policy contracts. Previous studies on CC in the world have already forecasted its effects on the agricultural sector. Researchers have found that global CC will impact the agricultural sector in different world regions. The study of the impacts of CC on various agrarian activities in other demographic areas and the development of relative strategies to respond to effects has become a focal point for researchers (Chandioet al. 2020 ; Gleditsch 2021 ; Mosavi et al. 2020 ).

With the rapid growth of global warming since the 1980s, the temperature has started increasing globally, which resulted in the incredible transformation of rain and evaporation in the countries. The agricultural development of many countries has been reliant, delicate, and susceptible to CC for a long time, and it is on the development of agriculture total factor productivity (ATFP) influence different crops and yields of farmers (Alhassan 2021 ; Wu  2020 ).

Food security and natural disasters are increasing rapidly in the world. Several major climatic/natural disasters have impacted local crop production in the countries concerned. The effects of these natural disasters have been poorly controlled by the development of the economies and populations and may affect human life as well. One example is China, which is among the world’s most affected countries, vulnerable to natural disasters due to its large population, harsh environmental conditions, rapid CC, low environmental stability, and disaster power. According to the January 2016 statistical survey, China experienced an economic loss of 298.3 billion Yuan, and about 137 million Chinese people were severely affected by various natural disasters (Xie et al. 2018 ).

Mitigation and adaptation strategies of climate changes

Adaptation and mitigation are the crucial factors to address the response to CC (Jahanzad et al. 2020 ). Researchers define mitigation on climate changes, and on the other hand, adaptation directly impacts climate changes like floods. To some extent, mitigation reduces or moderates greenhouse gas emission, and it becomes a critical issue both economically and environmentally (Botzen et al. 2021 ; Jahanzad et al. 2020 ; Kongsager 2018 ; Smit et al. 2000 ; Vale et al. 2021 ; Usman et al. 2021 ; Verheyen 2005 ).

Researchers have deep concern about the adaptation and mitigation methodologies in sectoral and geographical contexts. Agriculture, industry, forestry, transport, and land use are the main sectors to adapt and mitigate policies(Kärkkäinen et al. 2020 ; Waheed et al. 2021 ). Adaptation and mitigation require particular concern both at the national and international levels. The world has faced a significant problem of climate change in the last decades, and adaptation to these effects is compulsory for economic and social development. To adapt and mitigate against CC, one should develop policies and strategies at the international level (Hussain et al. 2020 ). Figure  6 depicts the list of current studies on sectoral impacts of CC with adaptation and mitigation measures globally.

Sectoral impacts of climate change with adaptation and mitigation measures.

Conclusion and future perspectives

Specific socio-agricultural, socio-economic, and physical systems are the cornerstone of psychological well-being, and the alteration in these systems by CC will have disastrous impacts. Climate variability, alongside other anthropogenic and natural stressors, influences human and environmental health sustainability. Food security is another concerning scenario that may lead to compromised food quality, higher food prices, and inadequate food distribution systems. Global forests are challenged by different climatic factors such as storms, droughts, flash floods, and intense precipitation. On the other hand, their anthropogenic wiping is aggrandizing their existence. Undoubtedly, the vulnerability scale of the world’s regions differs; however, appropriate mitigation and adaptation measures can aid the decision-making bodies in developing effective policies to tackle its impacts. Presently, modern life on earth has tailored to consistent climatic patterns, and accordingly, adapting to such considerable variations is of paramount importance. Because the faster changes in climate will make it harder to survive and adjust, this globally-raising enigma calls for immediate attention at every scale ranging from elementary community level to international level. Still, much effort, research, and dedication are required, which is the most critical time. Some policy implications can help us to mitigate the consequences of climate change, especially the most affected sectors like the agriculture sector;

Warming might lengthen the season in frost-prone growing regions (temperate and arctic zones), allowing for longer-maturing seasonal cultivars with better yields (Pfadenhauer 2020 ; Bonacci 2019 ). Extending the planting season may allow additional crops each year; when warming leads to frequent warmer months highs over critical thresholds, a split season with a brief summer fallow may be conceivable for short-period crops such as wheat barley, cereals, and many other vegetable crops. The capacity to prolong the planting season in tropical and subtropical places where the harvest season is constrained by precipitation or agriculture farming occurs after the year may be more limited and dependent on how precipitation patterns vary (Wu et al. 2017 ).

The genetic component is comprehensive for many yields, but it is restricted like kiwi fruit for a few. Ali et al. ( 2017 ) investigated how new crops will react to climatic changes (also stated in Mall et al. 2017 ). Hot temperature, drought, insect resistance; salt tolerance; and overall crop production and product quality increases would all be advantageous (Akkari 2016 ). Genetic mapping and engineering can introduce a greater spectrum of features. The adoption of genetically altered cultivars has been slowed, particularly in the early forecasts owing to the complexity in ensuring features are expediently expressed throughout the entire plant, customer concerns, economic profitability, and regulatory impediments (Wirehn 2018 ; Davidson et al. 2016 ).

To get the full benefit of the CO 2 would certainly require additional nitrogen and other fertilizers. Nitrogen not consumed by the plants may be excreted into groundwater, discharged into water surface, or emitted from the land, soil nitrous oxide when large doses of fertilizer are sprayed. Increased nitrogen levels in groundwater sources have been related to human chronic illnesses and impact marine ecosystems. Cultivation, grain drying, and other field activities have all been examined in depth in the studies (Barua et al. 2018 ).

• The technological and socio-economic adaptation

The policy consequence of the causative conclusion is that as a source of alternative energy, biofuel production is one of the routes that explain oil price volatility separate from international macroeconomic factors. Even though biofuel production has just begun in a few sample nations, there is still a tremendous worldwide need for feedstock to satisfy industrial expansion in China and the USA, which explains the food price relationship to the global oil price. Essentially, oil-exporting countries may create incentives in their economies to increase food production. It may accomplish by giving farmers financing, seedlings, fertilizers, and farming equipment. Because of the declining global oil price and, as a result, their earnings from oil export, oil-producing nations may be unable to subsidize food imports even in the near term. As a result, these countries can boost the agricultural value chain for export. It may be accomplished through R&D and adding value to their food products to increase income by correcting exchange rate misalignment and adverse trade terms. These nations may also diversify their economies away from oil, as dependence on oil exports alone is no longer economically viable given the extreme volatility of global oil prices. Finally, resource-rich and oil-exporting countries can convert to non-food renewable energy sources such as solar, hydro, coal, wind, wave, and tidal energy. By doing so, both world food and oil supplies would be maintained rather than harmed.

IRENA’s modeling work shows that, if a comprehensive policy framework is in place, efforts toward decarbonizing the energy future will benefit economic activity, jobs (outweighing losses in the fossil fuel industry), and welfare. Countries with weak domestic supply chains and a large reliance on fossil fuel income, in particular, must undertake structural reforms to capitalize on the opportunities inherent in the energy transition. Governments continue to give major policy assistance to extract fossil fuels, including tax incentives, financing, direct infrastructure expenditures, exemptions from environmental regulations, and other measures. The majority of major oil and gas producing countries intend to increase output. Some countries intend to cut coal output, while others plan to maintain or expand it. While some nations are beginning to explore and execute policies aimed at a just and equitable transition away from fossil fuel production, these efforts have yet to impact major producing countries’ plans and goals. Verifiable and comparable data on fossil fuel output and assistance from governments and industries are critical to closing the production gap. Governments could increase openness by declaring their production intentions in their climate obligations under the Paris Agreement.

It is firmly believed that achieving the Paris Agreement commitments is doubtlful without undergoing renewable energy transition across the globe (Murshed 2020 ; Zhao et al. 2022 ). Policy instruments play the most important role in determining the degree of investment in renewable energy technology. This study examines the efficacy of various policy strategies in the renewable energy industry of multiple nations. Although its impact is more visible in established renewable energy markets, a renewable portfolio standard is also a useful policy instrument. The cost of producing renewable energy is still greater than other traditional energy sources. Furthermore, government incentives in the R&D sector can foster innovation in this field, resulting in cost reductions in the renewable energy industry. These nations may export their technologies and share their policy experiences by forming networks among their renewable energy-focused organizations. All policy measures aim to reduce production costs while increasing the proportion of renewables to a country’s energy system. Meanwhile, long-term contracts with renewable energy providers, government commitment and control, and the establishment of long-term goals can assist developing nations in deploying renewable energy technology in their energy sector.

Author contribution

KA: Writing the original manuscript, data collection, data analysis, Study design, Formal analysis, Visualization, Revised draft, Writing-review, and editing. MZQ: Writing the original manuscript, data collection, data analysis, Writing-review, and editing. HS: Contribution to the contextualization of the theme, Conceptualization, Validation, Supervision, literature review, Revised drapt, and writing review and editing. MM: Writing review and editing, compiling the literature review, language editing. HM: Writing review and editing, compiling the literature review, language editing. IY: Contribution to the contextualization of the theme, literature review, and writing review and editing.

Availability of data and material

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The authors declare no competing interests.

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Contributor Information

Kashif Abbass, Email: nc.ude.tsujn@ssabbafihsak .

Muhammad Zeeshan Qasim, Email: moc.kooltuo@888misaqnahseez .

Huaming Song, Email: nc.ude.tsujn@gnimauh .

Muntasir Murshed, Email: [email protected] .

Haider Mahmood, Email: moc.liamtoh@doomhamrediah .

Ijaz Younis, Email: nc.ude.tsujn@sinuoyzaji .

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Climate change, energy, environment and sustainability topics research guide

What is climate change.

Climate change refers to long-term shifts in temperatures and weather patterns. The world is now warming faster than at any point in recorded history, which disrupts the usual balance of nature and is a threat to human beings and other forms of life on Earth. This topic guide includes sample keywords and search terms, databases to find sources, and samples of online books.

Example keywords and subtopics

Example keywords or search terms:  

• Climate change
• global warming
• greenhouse effect or greenhouse gas
• climate crisis
• environmental change
• clean energy
• alternative energy or renewable energy
• green energy or renewable energy or clean energy
• Low carbon or carbon neutral
• Carbon offsetting
• sustainability environment or sustainability
• environmental protection
• pollution or contamination
• impact or effect or influence
• cost or price or expense or money or financial
• fossil fuels or coal or oil or gas

Tip: This is a big topic with lots written so you can often focus on one or two subtopics. This will help to find more relevant sources, more quickly and be a better fit for an assignment. 

Possible subtopics ideas:  Pick one or two subtopics and then add those words to your search.

• Health impacts of climate changes (e.g. air pollution, water pollution, etc.)
• impacts on a specific city, state, region or country
• political impacts (e.g. voting, government policy, etc.)
• impact on specific population or culture (e.g. children, elderly, racial or ethic group, country, etc.)
• specific types of renewable or alternative energy (e.g. solar, wind, bio, etc.) 
• example of new technology (e.g. electric cars or electric vehicles or hybrid vehicles
• economic impacts (e.g. business, employment, industry (e.g. oil, coal, etc.)
• weather and impacts (e.g. rising sea levels, flooding, droughts or heat waves, etc.)
• media aspects (e.g. news coverage, advertising, misinformation, movies, music, etc.) 
• Tutorial: Creating an effective search strategy

• Use meaningful keywords to find the best sources
• Apply search strategies like AND and OR to connect keywords
• Tutorial: What is a library database and why should I use one?

• Identify what a library database is
• Recognize the two main types of library databases
• Know why you should use them
• Understand why searching a library database is different than searching the general internet

Databases for finding sources

Article Databases - 

Use articles to find new research, specific information and evidence to support or refute a claim. You can also look at the bibliography or works cited to find additional sources. Some articles give an overview of a specific topic -- sometimes called "review articles" or "meta-analyses" or "systematic review." Databases are like mini-search engines for finding articles (e.g. Business Source Premier database searches business journals, business magazines and business newspapers). Pick a database that searches the subject of articles you want to find. 

• Agricultural & Environmental Science Database Search journals and literature on agriculture, pollution, animals, environment, policy, natural resources, water issues and more. Searches tools like AGRICOLA, Environmental Sciences & Pollution Management (ESPM), and Digests of Environmental Impact Statements (EIS) databases.
• GreenFILE Collection of scholarly, government and general-interest titles. Multidisciplinary by nature, GreenFILE draws on the connections between the environment and agriculture, education, law, health and technology. Topics covered include global climate change, green building, pollution, sustainable agriculture, renewable energy, recycling, and more.
• Ethnic NewsWatch Ethnic NewsWatch is a current resource of full-text newspapers, magazines, and journals of the ethnic and minority press from 1990, providing researchers access to essential, often overlooked perspectives.
• Opposing Viewpoints in Context Find articles on current issues, including viewpoint articles, topic overviews, statistics, primary documents, magazine and newspaper articles.

Sample of online books

Below are a selection of online books and readings on the broad topic. We have more online books, journal articles, and sources in our Libraries Search and article databases.  

• A climate policy revolution : what the science of complexity reveals about saving our planet by Roland Kupers ISBN: 9780674246812 Publication Date: 2020 "In this book, Roland Kupers argues that the climate crisis is well suited to the bottom-up, rapid, and revolutionary change complexity science theorizes; he succinctly makes the case that complexity science promises policy solutions to address climate change."

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• Peer Research Consultants Make an online 30 minute appointment for one-on-one peer assistance with your research. Get help with researching your topic, finding sources, citing sources and more. Peer Research Consultants can also help you get started with faculty-sponsored research.
• Chat 24/7 online with the Libraries Ask us anything! Chat with a librarian, 24 hours a day, 7 days a week with any research or library questions.
• Meet with a librarian Schedule an online consultations for personalized research support primarily for University of Minnesota faculty, instructors, graduate and undergraduate students and staff.

• Frontiers in Sociology
• Medical Sociology
• Research Topics

Climate Change and Society

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About this Research Topic

Climate change represents the greatest challenge of the 21st Century and will affect human societies in multiple ways. Our knowledge about the nature and physics of climate change, its causes and its consequences, is far greater than our understanding of the societal changes it poses. Climate change ...

Keywords : Climate Change, Social Sciences, Perceptions, Public Policy, Interdisciplinarity

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Research areas

The Grantham Research Institute on Climate Change and the Environment brings together international expertise from a wide range of disciplines, including economics, finance, geography, the environment, international development and the political economy. This expertise enables us to produce globally recognised, policy-relevant research and analysis. Our work is divided across the following 13 broad research areas.

Biodiversity

Biodiversity represents the variety and variability of life on Earth – it underpins and is fundamentally affected by human activity.

Climate change adaptation and resilience

How we can improve the resilience of countries, communities and companies to current and future climate change impacts.

Climate change governance, legislation and litigation

The role of climate governance, laws, policies and court cases in tackling climate change. Includes our Climate Change Laws of the World database.

Climate, health, and environment

Assessing the global health threat posed by climate change due to factors such as increasing heat, extreme weather events, food insecurity, greater spread of infectious diseases, and greater psychological trauma.

Environmental behaviour

Examining how people make decisions and behave with respect to environmental issues, a critical input to our transition to a more sustainable pathway.

Environmental economic theory

Using theoretical techniques from the economics discipline to study climate change and environmental problems.

Environmental policy evaluation

Analysing the effectiveness and impacts of current and future climate and energy policies, from the local to the international.

International climate politics

Focusing the spotlight on the role of international cooperation, diplomacy and political leadership in tackling climate change.

Science and impacts of climate change

The role of climate science and modelling in helping to project the environmental, social and economic impacts of climate change.

Sustainable natural resources

The policy and practical challenges of ensuring the environment and natural resources are sustainably maintained and used.

Sustainable public and private finance

How to effectively mobilise finance to realise the Paris Agreement and the Sustainable Development Goals.

Transition to zero emissions growth

Understanding the economic, technological, behavioural and institutional factors that will assist the transition to zero emissions growth.

UK national and local climate policies

Engaging decision-makers in the UK on policy issues related to climate change and the environment.

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The Science of Climate Change Explained: Facts, Evidence and Proof

Definitive answers to the big questions.

Credit... Photo Illustration by Andrea D'Aquino

Supported by

By Julia Rosen

Ms. Rosen is a journalist with a Ph.D. in geology. Her research involved studying ice cores from Greenland and Antarctica to understand past climate changes.

• Published April 19, 2021 Updated Nov. 6, 2021

The science of climate change is more solid and widely agreed upon than you might think. But the scope of the topic, as well as rampant disinformation, can make it hard to separate fact from fiction. Here, we’ve done our best to present you with not only the most accurate scientific information, but also an explanation of how we know it.

How do we know climate change is really happening?

• How much agreement is there among scientists about climate change?
• Do we really only have 150 years of climate data? How is that enough to tell us about centuries of change?
• How do we know climate change is caused by humans?
• Since greenhouse gases occur naturally, how do we know they’re causing Earth’s temperature to rise?
• Why should we be worried that the planet has warmed 2°F since the 1800s?
• Is climate change a part of the planet’s natural warming and cooling cycles?
• How do we know global warming is not because of the sun or volcanoes?
• How can winters and certain places be getting colder if the planet is warming?
• Wildfires and bad weather have always happened. How do we know there’s a connection to climate change?
• How bad are the effects of climate change going to be?
• What will it cost to do something about climate change, versus doing nothing?

Climate change is often cast as a prediction made by complicated computer models. But the scientific basis for climate change is much broader, and models are actually only one part of it (and, for what it’s worth, they’re surprisingly accurate ).

For more than a century , scientists have understood the basic physics behind why greenhouse gases like carbon dioxide cause warming. These gases make up just a small fraction of the atmosphere but exert outsized control on Earth’s climate by trapping some of the planet’s heat before it escapes into space. This greenhouse effect is important: It’s why a planet so far from the sun has liquid water and life!

However, during the Industrial Revolution, people started burning coal and other fossil fuels to power factories, smelters and steam engines, which added more greenhouse gases to the atmosphere. Ever since, human activities have been heating the planet.

Where it was cooler or warmer in 2020 compared with the middle of the 20th century

Global average temperature compared with the middle of the 20th century

+0.75°C

–0.25°

30 billion metric tons

Carbon dioxide emitted worldwide 1850-2017

Rest of world

Other developed

European Union

Developed economies

Other countries

United States

E.U. and U.K.

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Climate change: a threat to human wellbeing and health of the planet. taking action now can secure our future.

BERLIN, Feb 28 – Human-induced climate change is causing dangerous and widespread disruption in nature and affecting the lives of billions of people around the world, despite efforts to reduce the risks. People and ecosystems least able to cope are being hardest hit, said scientists in the latest Intergovernmental Panel on Climate Change (IPCC) report, released today.

“This report is a dire warning about the consequences of inaction,” said Hoesung Lee, Chair of the IPCC. “It shows that climate change is a grave and mounting threat to our wellbeing and a healthy planet. Our actions today will shape how people adapt and nature responds to increasing climate risks.”

The world faces unavoidable multiple climate hazards over the next two decades with global warming of 1.5°C (2.7°F). Even temporarily exceeding this warming level will result in additional severe impacts, some of which will be irreversible. Risks for society will increase, including to infrastructure and low-lying coastal settlements.

The Summary for Policymakers of the IPCC Working Group II report,  Climate Change 2022: Impacts, Adaptation and Vulnerability was approved on Sunday, February 27 2022, by 195 member governments of the IPCC, through a virtual approval session that was held over two weeks starting on February 14.

Urgent action required to deal with increasing risks

Increased heatwaves, droughts and floods are already exceeding plants’ and animals’ tolerance thresholds, driving mass mortalities in species such as trees and corals. These weather extremes are occurring simultaneously, causing cascading impacts that are increasingly difficult to manage. They have exposed millions of people to acute food and water insecurity, especially in Africa, Asia, Central and South America, on Small Islands and in the Arctic.

To avoid mounting loss of life, biodiversity and infrastructure, ambitious, accelerated action is required to adapt to climate change, at the same time as making rapid, deep cuts in greenhouse gas emissions. So far, progress on adaptation is uneven and there are increasing gaps between action taken and what is needed to deal with the increasing risks, the new report finds. These gaps are largest among lower-income populations. 

The Working Group II report is the second instalment of the IPCC’s Sixth Assessment Report (AR6), which will be completed this year.

“This report recognizes the interdependence of climate, biodiversity and people and integrates natural, social and economic sciences more strongly than earlier IPCC assessments,” said Hoesung Lee. “It emphasizes the urgency of immediate and more ambitious action to address climate risks. Half measures are no longer an option.”

Safeguarding and strengthening nature is key to securing a liveable future

There are options to adapt to a changing climate. This report provides new insights into nature’s potential not only to reduce climate risks but also to improve people’s lives.

“Healthy ecosystems are more resilient to climate change and provide life-critical services such as food and clean water”, said IPCC Working Group II Co-Chair Hans-Otto Pörtner. “By restoring degraded ecosystems and effectively and equitably conserving 30 to 50 per cent of Earth’s land, freshwater and ocean habitats, society can benefit from nature’s capacity to absorb and store carbon, and we can accelerate progress towards sustainable development, but adequate finance and political support are essential.”

Scientists point out that climate change interacts with global trends such as unsustainable use of natural resources, growing urbanization, social inequalities, losses and damages from extreme events and a pandemic, jeopardizing future development.

“Our assessment clearly shows that tackling all these different challenges involves everyone – governments, the private sector, civil society – working together to prioritize risk reduction, as well as equity and justice, in decision-making and investment,” said IPCC Working Group II Co-Chair Debra Roberts.

“In this way, different interests, values and world views can be reconciled. By bringing together scientific and technological know-how as well as Indigenous and local knowledge, solutions will be more effective. Failure to achieve climate resilient and sustainable development will result in a sub-optimal future for people and nature.”

Cities: Hotspots of impacts and risks, but also a crucial part of the solution

This report provides a detailed assessment of climate change impacts, risks and adaptation in cities, where more than half the world’s population lives. People’s health, lives and livelihoods, as well as property and critical infrastructure, including energy and transportation systems, are being increasingly adversely affected by hazards from heatwaves, storms, drought and flooding as well as slow-onset changes, including sea level rise.

“Together, growing urbanization and climate change create complex risks, especially for those cities that already experience poorly planned urban growth, high levels of poverty and unemployment, and a lack of basic services,” Debra Roberts said.

“But cities also provide opportunities for climate action – green buildings, reliable supplies of clean water and renewable energy, and sustainable transport systems that connect urban and rural areas can all lead to a more inclusive, fairer society.”

There is increasing evidence of adaptation that has caused unintended consequences, for example destroying nature, putting peoples’ lives at risk or increasing greenhouse gas emissions. This can be avoided by involving everyone in planning, attention to equity and justice, and drawing on Indigenous and local knowledge.

A narrowing window for action

Climate change is a global challenge that requires local solutions and that’s why the Working Group II contribution to the IPCC’s Sixth Assessment Report (AR6) provides extensive regional information to enable Climate Resilient Development.

The report clearly states Climate Resilient Development is already challenging at current warming levels. It will become more limited if global warming exceeds 1.5°C (2.7°F). In some regions it will be impossible if global warming exceeds 2°C (3.6°F). This key finding underlines the urgency for climate action, focusing on equity and justice. Adequate funding, technology transfer, political commitment and partnership lead to more effective climate change adaptation and emissions reductions.

“The scientific evidence is unequivocal: climate change is a threat to human wellbeing and the health of the planet. Any further delay in concerted global action will miss a brief and rapidly closing window to secure a liveable future,” said Hans-Otto Pörtner.

For more information, please contact:

IPCC Press Office, Email: [email protected]   IPCC Working Group II:  Sina Löschke,  Komila Nabiyeva: [email protected]

Notes for Editors

Climate Change 2022: Impacts, Adaptation and Vulnerability. Contribution of Working Group II to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change

The Working Group II report examines the impacts of climate change on nature and people around the globe. It explores future impacts at different levels of warming and the resulting risks and offers options to strengthen nature’s and society’s resilience to ongoing climate change, to fight hunger, poverty, and inequality and keep Earth a place worth living on – for current as well as for future generations. 

Working Group II introduces several new components in its latest report: One is a special section on climate change impacts, risks and options to act for cities and settlements by the sea, tropical forests, mountains, biodiversity hotspots, dryland and deserts, the Mediterranean as well as the polar regions. Another is an atlas that will present data and findings on observed and projected climate change impacts and risks from global to regional scales, thus offering even more insights for decision makers.

The Summary for Policymakers of the Working Group II contribution to the Sixth Assessment Report (AR6) as well as additional materials and information are available at https://www.ipcc.ch/report/ar6/wg2/

Note : Originally scheduled for release in September 2021, the report was delayed for several months by the COVID-19 pandemic, as work in the scientific community including the IPCC shifted online. This is the second time that the IPCC has conducted a virtual approval session for one of its reports.

AR6 Working Group II in numbers

270 authors from 67 countries

• 47 – coordinating authors
• 184 – lead authors
• 39 – review editors
• 675 – contributing authors

Over 34,000 cited references

A total of 62,418 expert and government review comments

(First Order Draft 16,348; Second Order Draft 40,293; Final Government Distribution: 5,777)

More information about the Sixth Assessment Report can be found  here .

Additional media resources

Assets available after the embargo is lifted on Media Essentials website .

Press conference recording, collection of sound bites from WGII authors, link to presentation slides, B-roll of approval session, link to launch Trello board including press release and video trailer in UN languages, a social media pack.

The website includes  outreach materials  such as videos about the IPCC and video recordings from  outreach events  conducted as webinars or live-streamed events.

Most videos published by the IPCC can be found on our  YouTube  channel. Credit for artwork

About the IPCC

The Intergovernmental Panel on Climate Change (IPCC) is the UN body for assessing the science related to climate change. It was established by the United Nations Environment Programme (UNEP) and the World Meteorological Organization (WMO) in 1988 to provide political leaders with periodic scientific assessments concerning climate change, its implications and risks, as well as to put forward adaptation and mitigation strategies. In the same year the UN General Assembly endorsed the action by the WMO and UNEP in jointly establishing the IPCC. It has 195 member states.

Thousands of people from all over the world contribute to the work of the IPCC. For the assessment reports, IPCC scientists volunteer their time to assess the thousands of scientific papers published each year to provide a comprehensive summary of what is known about the drivers of climate change, its impacts and future risks, and how adaptation and mitigation can reduce those risks.

The IPCC has three working groups:  Working Group I , dealing with the physical science basis of climate change;  Working Group II , dealing with impacts, adaptation and vulnerability; and  Working Group III , dealing with the mitigation of climate change. It also has a  Task Force on National Greenhouse Gas Inventories  that develops methodologies for measuring emissions and removals. As part of the IPCC, a Task Group on Data Support for Climate Change Assessments (TG-Data) provides guidance to the Data Distribution Centre (DDC) on curation, traceability, stability, availability and transparency of data and scenarios related to the reports of the IPCC.

IPCC assessments provide governments, at all levels, with scientific information that they can use to develop climate policies. IPCC assessments are a key input into the international negotiations to tackle climate change. IPCC reports are drafted and reviewed in several stages, thus guaranteeing objectivity and transparency. An IPCC assessment report consists of the contributions of the three working groups and a Synthesis Report. The Synthesis Report integrates the findings of the three working group reports and of any special reports prepared in that assessment cycle.

About the Sixth Assessment Cycle

At its 41st Session in February 2015, the IPCC decided to produce a Sixth Assessment Report (AR6). At its 42nd Session in October 2015 it elected a new Bureau that would oversee the work on this report and the Special Reports to be produced in the assessment cycle.

Global Warming of 1.5°C , an IPCC special report on the impacts of global warming of 1.5 degrees Celsius above pre-industrial levels and related global greenhouse gas emission pathways, in the context of strengthening the global response to the threat of climate change, sustainable development, and efforts to eradicate poverty  was launched in October 2018.

Climate Change and Land , an IPCC special report on climate change, desertification, land degradation, sustainable land management, food security, and greenhouse gas fluxes in terrestrial ecosystems  was launched in August 2019, and the  Special Report on the Ocean and Cryosphere in a Changing Climate  was released in September 2019.

In May 2019 the IPCC released the  2019 Refinement to the 2006 IPCC Guidelines for National Greenhouse Gas Inventories , an update to the methodology used by governments to estimate their greenhouse gas emissions and removals.

In August 2021 the IPCC released the Working Group I contribution to the AR6, Climate Change 2021, the Physical Science Basis

The Working Group III contribution to the AR6 is scheduled for early April 2022.

The Synthesis Report of the Sixth Assessment Report will be completed in the second half of 2022.

For more information go to  www.ipcc.ch

Related Content

Remarks by the ipcc chair during the press conference to present the working group ii contribution to the sixth assessment report.

Monday, 28 February 2022 Distinguished representatives of the media, WMO Secretary-General Petteri, UNEP Executive Director Andersen, We have just heard …

February 2022

Fifty-fifth session of the ipcc (ipcc-55) and twelfth session of working group ii (wgii-12), february 14, 2022, working group report, ar6 climate change 2022: impacts, adaptation and vulnerability.

Urgent need to address mental health effects of climate change, says report

• Mental Health
• Applied Psychology
• Climate Change

Offers recommendations for building resilience and taking action by individuals, communities

WASHINGTON — With a large majority of Americans concerned about climate change and an increasing number expressing alarm and distress, it is past time to address this burgeoning public health crisis at the individual, community and societal levels, according to a report from the American Psychological Association and ecoAmerica.

“Our climate is changing at an unprecedented and alarming rate with profound impacts on human life,” said the report, entitled, “Mental Health and Our Changing Climate: Impacts, Inequities, and Responses” (PDF, 4.27MB) . “Climate change-fueled acute disaster events are causing deleterious impacts on human health. Longer term climate change leads to temperature-related illness and mortality, spread of vector-borne disease, respiratory issues and allergic response, compromised fetal and child development, and threats to water and food supply and safety—among other impacts.”

The effects of climate change on humans, however, go beyond physical health.

“Climate change is one of the most crucial issues facing our nation and the world today, and it is already taking a huge toll on the mental health of people around the globe,” said APA CEO Arthur C. Evans Jr, PhD. “Psychology, as the science of behavior, will be pivotal to making the wholesale changes that are imperative to slow—and, we hope, stop—its advance.”

The report, an update to a 2017 report (PDF, 3.37MB) also issued by APA and ecoAmerica, is intended to inform and empower health and medical professionals, community and elected leaders and the public to pursue solutions to climate change that will support mental health and well-being. This is particularly important as world leaders proceed with climate negotiations at COP26, the United Nations Climate Change Conference.

Over three-quarters of Americans report that they are concerned about climate change, and about 25% say they are “alarmed,” nearly double the percentage who reported feeling alarm in 2017, according to the latest report.

The most immediate effects on mental health can be seen in the aftermath of increasing disaster events fueled by climate change, such as hurricanes, wildfires and floods. These effects can include trauma and shock, post-traumatic stress disorder, feelings of abandonment, and anxiety and depression that can lead to suicidal ideation and risky behavior. At the community level, these disasters can strain social relationships, reduce social cohesion and increase interpersonal violence and child abuse.

In the long term, climate change has equally profound mental health impacts. Rising temperatures can fuel mood and anxiety disorders, schizophrenia and vascular dementia, and can increase emergency room usage and suicide rates, according to the report. Changes in the local environment can cause grief, disorientation and poor work performance, as well as harm to interpersonal relationships and self-esteem. People displaced by climate change events, such wildfires or droughts, can experience loss of personal identity, among other more severe impacts. Ultimately, mass migrations spurred by long-term climate change can lead to intergroup hostilities, political conflicts, terrorism and even war.

Concern about climate change coupled with worry about the future can lead to fear, anger, feelings of powerlessness, exhaustion, stress and sadness, often referred to as “eco-anxiety” or “climate anxiety.” Studies indicate this anxiety is more prevalent among young people; it has been linked to increases in substance use and suicidal ideation.

The destructive effects of climate change are likely to fall disproportionately on communities that are already disadvantaged by historic and current social, economic and political oppression. For example, discriminatory housing policies, such as redlining and racially restrictive covenants, mean that people of color are significantly more likely to live in areas prone to risk. Indigenous people, children, older adults, women, people with disabilities or existing mental health conditions, and outdoor workers are additional groups that may be more prone to mental health difficulties from a changing climate. These impacts can include PTSD, behavioral problems, cognitive deficits, reduced memory, poorer academic performance and lower IQ, higher exposure to violence and crime, and higher rates of incarceration.

“Like climate change itself, these mental health implications and the related inequities cannot be ignored,” said Meighen Speiser, executive director of ecoAmerica. “We need to surface and address them immediately, and we can. America and Americans have the will and wherewithal to protect our climate and our future.”

The report offers a series of constructive solutions that can be applied by individuals and whole communities to help mitigate the mental health impacts of climate change. Key among them is encouraging resilience, or the ability of a person or a community to function, survive and even thrive in the face of adversity. Strategies include fostering a sense of optimism, bolstering social connections, and incorporating personal items that can preserve or strengthen mental health into emergency preparedness plans (e.g., religious items, toys for small children, favorite foods), among many additional recommendations.

Communities should also involve mental health professionals in expanding or strengthening plans for mental health care and support in response to local and regional disasters, according to the report. Mental health professionals can help with plans to increase social cohesion in the community, such as social programs and infrastructure planning to increase communal parks and other green spaces. The report likewise recommends that members from the community, including from a diversity of backgrounds, cultures, and abilities, be included in resiliency planning to account for varying needs.

And while efforts to boost resilience are necessary to protect physical and mental health in the face of climate change, the report also emphasizes the need to address the root of the problem by enacting policies to mitigate climate change at all levels of governance. National and local policymakers, businesses and nonprofits, mental health and other professionals and individuals can all help to bring forth these policies while also advancing climate resilience and action. The report outlines these opportunities and provides related tools and resources.

The report was written by Susan Clayton, PhD, Whitmore-Williams professor of psychology, College of Wooster; Christie Manning, PhD, director of sustainability and assistant professor of environmental studies, Macalester College; Meighen Speiser, executive director, ecoAmerica; and Nicole Hill, ecoAmerica.

Jennifer Giordano for ecoAmerica

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Kim I. Mills

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New study highlights expansion of drylands amidst impact of climate change

by University of Bristol

Nearly half of the world's land surface is now classified as drylands and these areas are accelerating their own proliferation, according to new research.

The findings, published August 29 in the journal Science , show around 45% of global land surface comprises deserts, shrublands, grasslands, and savanna woodlands. A chief characteristic of these regions is water scarcity, which significantly affects natural ecosystems and human-managed landscapes, including agriculture, forestry and livestock production.

While it has long been known that climate change and land management practices contribute to dryland expansion, the results revealed a surprising factor: drylands themselves are accelerating their own spread.

Climate scientists at the University of Bristol collaborated on the study, led by Ghent University, in Belgium, with experts at Cardiff University and ETH Zurich.

Co-author Katerina Michaelides, Professor of Dryland Hydrology, said, "Drylands occupy more than 40% of the global land surface and are characterized by water scarcity resulting from low precipitation and high atmospheric water demand.

"However, climate change is exacerbating atmospheric drying in these regions, leading to further terrestrial water loss through evaporation and driving the global expansion of drylands, transforming humid regions into more arid environments."

In this new study, researchers quantified the process of dryland self-expansion by analyzing the sources of precipitation and heat over newly expanded drylands. By tracking air movements over these regions over the past 40 years, the team was able to calculate, for the first time, how much of the rainfall deficits and increased atmospheric water demand contributing to dryland expansion could be attributed to existing drylands.

"Out of the approximately 5.2 million square kilometers of humid land that transitioned into dryland over the past four decades, more than 40% of the change was due to dryland self-expansion," said lead author Dr. Akash Koppa, Post-doctoral Research Fellow at the Hydro-Climate Extremes Lab (H-CEL), Ghent University.

The study found that drying soils in existing drylands release less moisture and more heat into the atmosphere, leading to reduced rainfall and increased atmospheric water demand in downwind humid regions. Over time, this process can cause these humid areas to gradually become drylands themselves.

In regions such as Australia and Eurasia, self-expansion has been identified as the primary driver of dryland spread.

Dr. Koppa added, "As we continue to move towards a warmer and potentially drier future, the phenomenon of dryland self-propagation could accelerate, posing significant risks to human livelihoods, ecosystems, and socio-economic stability globally."

The study also highlights the regions' most vulnerable to further dryland expansion and underscores the urgent need for climate change mitigation and sustainable land management practices. By quantifying the impact of distant vegetation responses on dryland expansion, the research emphasizes the importance of coordinated ecosystem conservation efforts in existing drylands.

The team is currently focused on developing land-based adaptation strategies to prevent drought and heat propagation.

Journal information: Science

Provided by University of Bristol

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CREDIT: DAVIDE BONAZZI / THEISPOT

Researchers are studying why hostility has become so high between groups with different political leanings.

Divided we stand: The rise of political animosity

Scientists peered into the partisan abyss. Here’s what they found.

By Carl-Johan Karlsson 08.19.2024

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America, it is often said, has never been more divided. Gone are the days when politicians routinely brokered deals across the aisle, and Republican and Democratic voters could disagree on policy yet still get along over the dinner table. Instead, polarization has transformed the democratic process, which once thrived on compromise and respectful dialogue, into a winner-takes-all battleground of dysfunction and animosity.

Congress, mired in perpetual gridlock, struggles to pass even the most essential legislation, undermining the principles of democracy. This legislative stalemate reflects a broader societal trend where Americans increasingly see those with opposing views not merely as adversaries, but as enemies.

This revelation has caused scholars to reevaluate the historical assumptions about what divides us as citizens: Is it anti-immigrant nationalism that pushes us towards the poles, or is it the widening chasm of inequality? Could the culprit be unchecked online vitriol and the diminished gatekeeping role of traditional media? Or perhaps it’s the allure of strongman leadership in uncertain times?

These deep divisions, which have intensified since the 1980s, were once deemed a largely American saga, with many experts blaming the country’s unusual two-party system. But in the past decade, political scientists have uncovered a similar trend across the globe — not just in countries with two invariably dominating political parties but in nations with diverse societal compositions, governing structures and levels of economic development. Such divisions have been reported in well-established multiparty democracies like Switzerland, Denmark and New Zealand, and in emerging economies such as Bulgaria, Turkey, the Czech Republic and Poland.

While there is no one explanation for why countries worldwide are fraying into extremes, recent findings suggest a common denominator: namely, that the key driver of polarization is more about emotion and identity than policy positions — a phenomenon known as “affective polarization.” Researchers are increasingly focusing on how people’s emotional and identity-based attachments to their political groups fuel hostility toward the opposition.

This shift in understanding emphasizes that the divide isn’t merely about differing opinions on issues. It is deeply rooted in the perception of political opponents as threats to one’s way of life and core values.

Once upon a friendlier time

The US wasn’t always so polarized. In fact, there was a time when some experts argued that American politics wasn’t polarized enough. In the 1950s, the American Political Science Association published a study concluding that the parties needed to become more distinct and coherent . “What the political scientists were saying in the 1950s was, ‘Nobody can tell the difference between our parties, nobody knows who to vote for, because we’re not making it clear, and so we need to be more different,’” says political psychologist Lilliana Mason of Johns Hopkins University, coauthor of the 2022 book Radical American Partisanship: Mapping Violent Hostility, Its Causes, and the Consequences for Democracy .

That ’50s report was widely criticized by the political science community at the time, but the decades that followed would set in motion sociopolitical changes that, eventually, more than fulfilled its vision.

The 1960s were the starting point of a sharper alignment in American politics, as civil rights legislation prompted many Southern Democrats to switch to the Republican Party, initiating a sorting that eventually grouped economic and racial conservatives together. Today, the increasing party distinctiveness is unmistakable in Congress. Between the 1950s and 1970s, typical members of Congress voted with their party on divisive questions just more than 60 percent of the time; in the 1990s, this figure rose past 80 percent, and since 2000, it has exceeded 87 percent.

In 2023, the average Democratic senator voted with President Biden 99 percent of the time on issues where Biden had a clear stance, according to the ABC News-owned polling website 538 . In the House, that figure was 93 percent, while the average Republican voted with the president only 5 percent of the time.

However, that doesn’t mean politicians are farther apart on policy issues than in the past, says Frances Lee, a political scientist now at Princeton University who wrote about the effect of party polarization on governance in the 2015 issue of the Annual Review of Political Science . What is often missed, Lee explains, are changes in the scope of policy issues over time. For example, even though measurements show increasing party division over what are categorized as civil rights issues, many of today’s votes are narrower in their effects than the 1960s civil rights legislation. This makes historical comparisons difficult.

In fact, Lee adds, while some measurements suggest more division , what they actually show is simply that the voting behavior of politicians has become more predictable. Unlike the bipartisan support for the Civil Rights Act of 1964, for example, today’s politicians tend to vote strictly with their party on divisive topics. Voting with one’s team may have become more important than policy.

A common ground ignored

Citizens may also not be as far apart on policy as commonly believed.

For example, a 2022 study published in The Journal of Politics shows that Americans severely misestimate the extent of ideological extremism of the opposing party’s voters. The authors surveyed over 13,000 Americans selected to reflect the demographics of the US population. Forty-nine percent of respondents said that voters belonging to the opposite party are extreme in their policy positions and frequently discuss politics; in reality, only 14 percent of voters behave that way.

“One thing we know is that it’s a very small slice of the public that has genuine, deep, ideological roots,” says Matthew Levendusky, a political scientist at the University of Pennsylvania who coauthored the study. “If you could give an essay quiz and ask people to explain liberalism and conservatism, that’s the domain of a small set of political activists and political hobbyists.”

Americans regularly misperceive people with different political loyalties. Participants in this survey reported their perceptions of the “typical” member of the rival party — how ideologically extreme their positions were as well as how frequently they engaged in political discussions. These ratings were then compared with actual behaviors among survey respondents.

The rest of us couldn’t explain the underlying philosophy of our policy positions. Rather, Levendusky says, people look to their party for guidance on what positions they should take, such as being in favor of more stringent gun control and climate policy if you’re a Democrat and being pro-gun rights and anti-tax if you’re a Republican.

In other words, as politicians increasingly prioritized party loyalty over policy deliberation, the electorate followed suit. By the 1990s and early 2000s, the Republican Party had become the camp of white Christian America, while the Democratic Party became a mix of everyone else, Mason says. Geographically, the divide grew: While members of different parties used to meet at church or the grocery store, Democrats increasingly became identified with urban and coastal areas, and Republicans with rural and heartland regions.

As a result, party affiliation evolved beyond political preference and became linked to racial, religious, cultural and geographical identities , Mason and coauthor Julie Wronski wrote in a 2018 paper. This alignment, they noted, intensified loyalty to one’s own party and diminished tolerance for opposing partisans. The growing focus on identity in American politics has been evident in the past decade, reflected in policy priorities, campaign strategies, media coverage and the actions of social movements.

Interestingly, Mason and Wronski’s research suggests — despite what some commentators posit — that Republicans are more susceptible to identity-based politics than those on the left, due to their party’s social homogeneity.

Mason also notes that even when Republicans and Democrats agree on policy, these identities can still foster animosity . To her, rather than carefully weighing the policies of a given party, supporters are becoming just that — supporters. In essence, we’re acting more like fans of a football team going to a game than a banker carefully choosing investments, she says.

The Democratic and Republican parties have become increasingly distinct in their demographic and ideological compositions. The Democratic Party has seen a growing representation of Blacks, Hispanics, seculars and liberals, shifting from a predominantly white coalition to one characterized by diversity and inclusion of nontraditional groups. In contrast, the Republican Party has solidified its base among whites, Christians and conservatives, reinforcing a homogeneous profile. This clear demographic sorting has led to a widely accepted view of Democrats as champions of racial diversity, religious secularism and liberalism, while Republicans are generally identified as white Christian conservatives.

Taking the political temperature

Other researchers have also concluded that mass polarization in the United States is less about policy-based division and more about people liking their own political camp and disliking the opposing one . A 2019 article in the Annual Review of Political Science , coauthored by Levendusky, shows that such affective polarization has increased drastically in the last four decades. Using survey data from the American National Election Study (ANES), the review measured feelings of warmth or coldness toward one’s own party and the opposing party on a “feeling thermometer” scale from 0 to 100.

Affective polarization, calculated as the difference between these ratings, rose from 22.64 degrees in 1978 to 40.87 degrees in 2016. While warm feelings toward one’s own party remained stable at around 70, sentiment toward the opposing party worsened significantly, dropping from the high 40s to just above 25.

More recent ANES data show that between 2016 and 2020, both warm feelings toward one’s own party and cold feelings toward the opposition increased even further, with affective polarization jumping from 41 to 52.2 degrees.

Negative feelings toward the rival party have worsened significantly, while positive feelings toward one’s own party have remained relatively stable. The trend illustrates rising affective polarization, with partisan sentiments becoming increasingly negative toward the opposition.

Researchers have found evidence of a similar dynamic playing out in other countries. For instance, one 2019 study — using the same feelings-thermometer score system — assessed supporters’ feelings toward their preferred and opposing parties in 22 European democracies and the United States between 2005 and 2016. It found that affective polarization was acutely present in European party systems — especially in Central Eastern Europe and Southern Europe.

As in the United States, hatred between voters in Europe isn’t necessarily connected to policy-based division, the study showed. But the link between the two appears to be stronger in structured, Western democracies with clear left-right spectrums, such as Germany and Sweden, notes political scientist Andres Reiljan of the European University Institute near Florence, who authored the study. Conversely, in poorer and less stable countries like Bulgaria and Montenegro, issues such as corruption and perceived incompetence might be more likely to drive hatred than policy divisions, the study suggests.

A 2021 study across 51 countries reported similar results, with countries like Bulgaria, Slovakia and the Czech Republic among the most polarized nations, while Iceland, Finland and the Netherlands appeared significantly less divided. Interestingly, these two studies showed the US as only moderately polarized when compared with other countries, but Reiljan, for one, notes that in his study, the categorization was based on figures from 2016. “Now, with our more recent data, I will say that, yes, it is comparatively also very highly polarized,” he says. “And it’s increasing faster, I would say, than most other countries.”

Reiljan’s suspicion received support from a study measuring trends in 12 OECD countries over the last 40 years. Of the countries included, the US experienced the largest increase in polarization . A 2023 study using the latest available data showed similar results, with the Unites States leading the pack in polarization if measuring the whole electorate, while affective polarization increased most noticeably in the United States and Germany among those who report a partisan identity.

Identity and emotion lead the way

One potential explanation for the intensity of partisan hatred in the US comes from a 2022 study published in the British Journal of Political Science . Examining data from 20 Western democracies since the mid-1990s, it found that people’s anger over political disagreements on issues like migration, religion and LGBTQ+ rights has intensified more than disagreement over economic issues.

These findings hint at what other scholars have proposed in the US context: that polarization today has much to do with identity and emotion. The most central topics in politics, such as abortion rights or racial policy, are essentially identity-based issues, Mason says. “And when the issue is about a group, about their very existence or status, or whether they are respected equally as Americans, or whether they have the same rights as other Americans, it doesn’t feel like an issue for that person. It feels like an existential threat.”

“That change, from debates about the economy to debates about cultural issues, based on our research, has been most dramatic in the United States,” says James Adams, a political scientist at the University of California, Davis, and a coauthor of the British Journal of Political Science study. “That may be one of the reasons why affective polarization has intensified dramatically in the United States over the last 25 years or so.”

Parties across Europe have also homed in on cultural issues, especially populist leaders who leverage explosive topics to rally voter blocs. But while most experts see the rise of extremist parties as a key driver of polarization, studies may fail to fully capture this. Measuring affective polarization in the multiparty context seen in many European countries is challenging because traditional metrics, such as the feeling thermometer, are designed for two-party systems. In multiparty systems, voters may intensely hate one party but feel neutral toward others, diluting the final score.

The US has experienced the most rapid growth in affective polarization among the general electorate since 1980 among the 12 OECD countries considered in this 2024 study, with five other countries experiencing smaller increases in polarization, and six experiencing declines in polarization.

Despite this, there’s a clear polarizing trend to be seen, with these intensely disliked populist parties growing stronger and disliking the mainstream in return, says political scientist Markus Wagner of the University of Vienna, who specializes in research on party competition and political behavior.

Negative campaigns deepen the divide

Research suggests that affective polarization is also fueled by the negative campaigning that has become a staple of modern electoral communication. A 2024 paper analyzing surveys and 17 elections between 2016 and 2020 found that political leaders’ attacks — on opponents’ policies, records or character — exacerbate affective polarization. This effect is more pronounced among those with strong partisan leanings.

Study coauthor Alessandro Nai, who specializes in political communication at the University of Amsterdam, explains that the whole system is part of a toxic spiral, with increased aggressiveness between politicians radicalizing the public, and the public — which is now more radicalized — demanding more aggressiveness from politicians. Nai also has evidence that more extreme, populist followers are more likely to appreciate negative campaign messages , finding them more amusing and fair than moderate citizens do, and are more apt to respond to such messaging with increased affective polarization. People on the populist extremes score higher in traits such as aggressiveness, narcissism and callousness in studies, Nai notes, adding that a “cold” person is therefore more likely to buy the aggressive playbook from politicians.

Importantly, some of Nai’s preliminary research also suggests that negative messaging from one’s own camp stokes more dislike than do attacks from adversaries. In other words, if one’s own preferred politician attacks an adversary, this boosts affective polarization much more than if an adversary attacks your preferred politician.

Marine Le Pen, leader of the right-wing National Rally (Rassemblement National), addresses supporters during the 2022 French presidential campaign.

CREDIT: MAXPPP / ALAMY STOCK PHOTO

That might be especially true in today’s siloed, targeted and viral media environment. In their 2022 Journal of Politics paper on how Americans overestimate each other’s political extremeness , Levendusky and coauthors suggest that the caricatured image of “the other side” as extreme ideologues is fueled by social media, where much of the political content is created by people who are disproportionately committed to politics.

As a result, what comes to mind when people think of those from the other party, the study argues, are “fervent partisans pleading their cases,” rather than neighbors or colleagues who rarely discuss politics. The mass media’s focus on political conflict has further enforced this partisan stereotyping.

Simple but effective interventions

The negative impacts of severe polarization are clear. When democratic institutions are viewed as battlegrounds for existential issues rather than arenas for reasoned policymaking, it leaves legislators in gridlocks , judiciaries stacked with loyalists and erodes democratic norms. A crisis of interpersonal trust is added to one of institutional trust: Fellow citizens are reduced to loathed enemies with malicious aims; civility is replaced by hostility as public discourse deteriorates — all while the doorway widens for populist leaders who exploit our emotions by peddling divisive rhetoric and extremist ideologies.

Experts worldwide are now thinking hard behind the scenes about how to pull our societies back from the brink. It’s a mammoth task, especially if considering broader underlying issues. For example, Adams’ research highlights that inequality and unemployment drive affective polarization, and that winner-takes-all electoral systems — such as those in Canada, Britain and the United States — also tend to exacerbate the animosity. These are systemic, structural issues that can’t be solved by focusing on polarization alone. However, researchers have found that some — surprisingly simple — interventions can nonetheless be very effective.

An analysis by a research consortium studying anti-democratic sentiment identified 25 ways to reduce partisan animosity ; out of those, three stood out as particularly promising.

One successful intervention involved participants watching a commercial where pairs of individuals with opposing political views formed bonds despite their differences. The video highlighted disagreements on topics like climate change , feminism and transgender identity, yet showed the two people collaborating and ultimately choosing to socialize together. This intervention yielded a 10.47 percent decrease in animosity, based on survey questions conducted before and after the intervention.

In another intervention, participants read book quotes arguing that the news media creates polarization to maximize its audience and that most Democrats and Republicans are part of an “exhausted majority” that rejects polarization. Participants also saw data suggesting that increased consumption of news media correlates with more distorted perceptions of opposing views. Participants were then guided on retaking control from media influence and asked to advise others on achieving this. It resulted in a 10.22 percent decrease in animosity.

A third intervention had participants read about the pivotal role of democracy in America’s leadership in technology and culture, and how extreme partisanship threatens this. They learned that research shows that the vast majority of Americans support democracy and that, contrary to popular belief, most members of both parties support democratic rules, disapprove of violence, and like one another. Participants were then asked to write about their two favorite things about being American. The intervention resulted in a 9.20 percent decrease in animosity.

By appealing to people’s sense of camaraderie, common nationality and resistance to exploitative media, these simple methods proved capable of reducing partisan animosity, at least in study settings. In her 2022 book on American partisanship , Mason similarly notes how minimal interventions can have significant impacts. “We found that just reading a quote from either Joe Biden or Donald Trump that says violence is not OK makes people less approving of violence,” she says.

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Adams emphasizes the need to dial down the aggressive rhetoric among leaders, where Democrats and Republicans publicly demonize the other side. He references a working paper on the 2022 US elections that found a reduction in Twitter toxicity with this unusual method: Researchers informed politicians that they were monitoring their accounts and that their tweet toxicity scores would be sent to a non-governmental organization for possible publication just before the election.

Another effective method, Adams says, might be demonstrating to politicians that toxic rhetoric doesn’t necessarily benefit them. An additional working paper found that although politicians who frequently use insults gain more media attention, they generally perform worse than politicians who focus on policy: They’re assigned to less powerful committees, don’t perform better in elections and don’t raise more campaign funds.

Researchers are only starting to understand the prevalence and drivers of polarization around the world. And while there is no silver bullet to close the yawning social and political gaps dividing our societies, it’s a hopeful sign that the issue has now entered the public consciousness. Only five years ago, Adams says, few academic journals paid any mind to research about affective polarization. “I think a lot of political scientists just thought, ‘Well, it’s only about people’s feelings,’” he says. Then came January 6 and the storming of the US Capitol. “Suddenly, now, everyone is interested in affective polarization.”

Reiljan tells a similar story — that when he started his research as a PhD student in 2015, there was barely any cross-country scholarship on the topic available. Some months back, he hosted a conference on polarization where scholars from across Europe and North America gathered to brainstorm strategies to reduce it.

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• Published: 27 January 2020

A topography of climate change research

• Max W. Callaghan   ORCID: orcid.org/0000-0001-8292-8758 1 , 2 ,
• Jan C. Minx   ORCID: orcid.org/0000-0002-2862-0178 1 , 2 &
• Piers M. Forster   ORCID: orcid.org/0000-0002-6078-0171 2  

Nature Climate Change volume  10 ,  pages 118–123 ( 2020 ) Cite this article

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The massive expansion of scientific literature on climate change 1 poses challenges for global environmental assessments and our understanding of how these assessments work. Big data and machine learning can help us deal with large collections of scientific text, making the production of assessments more tractable, and giving us better insights about how past assessments have engaged with the literature. We use topic modelling to draw a topic map, or topography, of over 400,000 publications from the Web of Science on climate change. We update current knowledge on the IPCC, showing that compared with the baseline of the literature identified, the social sciences are in fact over-represented in recent assessment reports. Technical, solutions-relevant knowledge—especially in agriculture and engineering—is under-represented. We suggest a variety of other applications of such maps, and our findings have direct implications for addressing growing demands for more solution-oriented climate change assessments that are also more firmly rooted in the social sciences 2 , 3 . The perceived lack of social science knowledge in assessment reports does not necessarily imply an IPCC bias, but rather suggests a need for more social science research with a focus on technical topics on climate solutions.

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Data availability.

The datasets from the study are available as Supplementary Information files.

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Acknowledgements

M.C. is supported by a PhD stipend from the Heinrich Böll Stiftung. J.M. acknowledges funding from the German Federal Ministry of Education and Research within the PEGASOS project (grant reference: 01LA1826A).

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M.W.C. and J.C.M. designed the research. M.W.C. performed the analysis. M.W.C., J.C.M. and P.M.F analysed the results. M.W.C. wrote the manuscript with contributions from all authors.

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Extended data

Extended data fig. 1 disciplinary entropy of topics..

Coloured bars show the proportion of each topic made up of papers from each disciplinary category. Crosses show the Disciplinary Entropy of each topic (see methods for details).

Extended Data Fig. 2 Topic make up of a single document.

The Doc Term Matrix shows the number of occurrences of each term in the document. The Topic Term Matrix shows the topic score of each term-topic combination. The Doc Topic Matrix shows the document-topic score for each topic. This topic makeup of the document shown is illustrated by the bars in the top left. Words highly associated with each topic that occur in the document are highlighted. All values are real, although the doc-term matrix is scaled by the inverse-document frequency before being used in the model.

Extended Data Fig. 3 IPCC Representation by subfield.

Representation is the share of the subset of documents being cited by the IPCC divided by the share of the subset in the whole literature. We plot on a log scale so that 0.5 is equally distant to 1 as 2; plot labels show real values.

Extended Data Fig. 4 SI Social science & representation in topics across working groups.

Representation is the share of the subset of documents being cited by the IPCC divided by the share of the subset in the whole literature. Social science proportion shows the proportion of the total document-topic score coming from documents in the social sciences.

Extended Data Fig. 5 Topic representation over different values of K (number of topics).

Topics in the upper or lower 6.66th percentile of either dimension are labelled. Representation is the share of the subset of documents being cited by the IPCC divided by the share of the subset in the whole literature. Assessment period occurrence refers to the center of a topic’s distribution across assessment periods (see methods for further details).

Supplementary information

Supplementary information.

Supplementary Table 1.

Reporting Summary

Supplementary data 1.

A list of the documents considered in this study, along with basic metadata and their position on the map. For copyright reasons, the full metadata from WoS cannot be published. To reproduce the analysis, it would be necessary to download the abstracts for the papers shown, either using the WoS IDs provided or the query documented in ref. 5 .

Supplementary Data 2

A list of the topics, along with their features discussed in this paper. The top ten words associated with each topic are also shown.

Supplementary Data 3

A list of document-topic scores, which can be cross-referenced with the document and topic IDs in docs.csv and topics.csv.

Supplementary Data 4

Models with different numbers of topics. It was used to select the topic model used for analysis in this paper.

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Callaghan, M.W., Minx, J.C. & Forster, P.M. A topography of climate change research. Nat. Clim. Chang. 10 , 118–123 (2020). https://doi.org/10.1038/s41558-019-0684-5

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But Ms Reeves could create a single flat rate of tax relief for all tax bands, the society said.

"First, the rate of income tax relief should be equalised for people on all tax bands - for example at 30% of gross earnings, midway between the 20p and 40p rates of tax," the thinktank said in a report. 

Ms Reeves could also reduce the maximum tax-free lump sum  you can get on retirement from £268,275 to £100,000 or 25% of pension wealth. 

"The Institute for Fiscal Studies estimates that this might eventually save over £2bn per year, which would be targeted entirely at people with high lifetime earnings or assets," the report added. 

Another suggestion was to charge national insurance on private pension incomes . 

The organisation said it would lead to today's affluent pensioners making a higher tax contribution.

Other possibilities could be to levy income tax on all inherited pensions. 

It said pension pots could also be liable to inheritance tax in the same way as other assets. 

What else did the chancellor say today?

Away from refusing to rule out pension tax changes, Ms Reeves also confirmed a cap on corporation tax.

Speaking during Treasury questions, she said the tax would be capped at its current level of 25% to "give business the confidence to grow". 

Corporation tax applies to the annual profits of UK resident companies and branches of overseas companies.

The 25% main rate is payable by companies with taxable profits above £250,000.

A small profits rate applies for companies with profits of £50,000 or below, meaning they will pay 19%.

Up until April 2023, the previous corporation tax main rate was 19%.

After the revival of popular Cadbury's chocolate bar Top Deck earlier this year, we asked you which discontinued treat you would like to see brought back - and we got so many responses that we've decided to make a weekly feature of it called  Bring It Back . 

Every Tuesday, we'll pick one from our comments box and look at why it was so beloved and, crucially, find out whether the companies in question might consider reintroducing them.

This week we're looking at a chocolate bar that became a staple of lunch boxes in the 1980s and '90s - and spawned a TV advert that is among the most fondly remembered of the era: McVitie's Trio.

Sold in multipacks of six, each bar included three segments made up of a caramel layer over biscuit, all covered with milk chocolate.

The product became synonymous with a memorable commercial that featured an animation by artist Bob Godfrey and a play on the traditional Jamaican folk song "Day-O (The Banana Boat Song)".

Its lyrics, which will be familiar to almost anyone who grew up in the 1980s, included the bar's tagline: "I want a Trio and I want one now."

Having discontinued the product in 2003, it briefly returned to shop shelves in 2016 following a Facebook campaign, before vanishing from sale again shortly after.

Hordes of Sky News readers have called for the chocolate bar's revival.

Kellie said: "I'd love to have Trios back! They were yummy. McVitie's really need to start selling them again."

Derek told us: "What a chocolate bar the Trio was! I could eat an entire multipack in one sitting now if given the chance. And that old advert... instantly transported back to childhood just thinking about it."

Samantha said: "I can hear the jingle in my head now! Trios were just delicious chocolate bars... and we want one now!"

When asked by Sky News, a McVitie's spokesperson conspicuously declined to rule out a return for the iconic chocolate treat, saying the company was "constantly listening to what audiences want".

"This helps us to keep innovating and adapting to changing tastes, meaning more biscuits and snacks you love for generations to come," they said.

"For those who miss the caramel taste of Trio, one of our newest and most exciting innovations, McVitie's Gold Billions Wafer, will be your new favourite for on-the-go chocolate moments."

And, tantalisingly for fans of the bar, they added: "Watch this space for more to come..."

Along with the legions of Trio diehards, the Money blog will certainly be doing that - and hope to bring you news of further developments in the crusade in the near future.

Got a craving for any of the products below? Click the links to find out if they've got any chance at making a comeback... 

NatWest has launched the cheapest five-year fixed mortgage deal on the market. 

The 3.71% rate comes with a £1,495 product fee and is available to customers who have a 40% deposit. 

Other lenders have also announced cuts this week, including Barclays and Halifax. 

Yesterday, Barclays reduced its five-year fixed 60% LTV remortgage deal from 4.06% to 3.93%. 

It also announced cuts across its purchase product range, with a five-year fixed 75% LTV deal coming with a 3.95% rate and a £899 product fee. 

Halifax also launched a 3.81% five-year deal to new borrowers yesterday. 

Brokers have welcomed the cuts as "hugely positive" news, and suggested more lenders could follow suit. 

"NatWest's latest rate cut is another clear signal that mortgage lenders are pulling out all the stops to reignite the housing market," Ranald Mitchell, director of Charwin Mortgages, told Newspage.

"This flurry of rate reductions is a positive step towards finding that sweet spot where consumer confidence rebounds, and the property market gets back on track. 

"It's an exciting time for potential buyers, affordability is improving, and the window of opportunity is wide open." 

Justin Moy, the managing director at EHF Mortgages, said: "Lenders are looking to grab some market share by the end of the year.

"Other lenders will likely want to make a similar move over the coming days to remain competitive." 

By James Sillars , business reporter

It's a fairly muted start to the day's trading, again, on financial markets.

The FTSE 100 has opened 10 points higher at 8,373.

Rolls-Royce, the civil aerospace-to-defence firm (not to be confused with the luxury motor car manufacturer), is leading the gainers.

Its shares rallied by 4% early this morning after a 6.5% decline the previous day.

That tumbled was in reaction to the apparent mid-air failure of one of its engines on a Cathay Pacific flight .

Analysts said that the share price recovery was down to an update from  the airline that the fleet affected should be back to full operation by the weekend.

A tweet Liam Gallagher wrote seven years ago criticising the eye-watering price of gig tickets has come back to haunt him.

His message, written in September 2017 about his older brother Noel, who was touring America with his band High Flying Birds at the time, read: "350 dollars to go and see rkid in USA what a c*** when will it all stop as you were LG x"

The tweet has resurfaced after dynamic pricing for Oasis's much-hyped reunion next year left fans - many of whom had spent hours queueing online - stunned after some standard tickets more than doubled in price from £148 to £355 on Ticketmaster due to demand.

X users pointed out the irony upon seeing the 2017 tweet, posting comments including, "Well this is evergreen", "What's your excuse for charging over 368 quid then?" and "Not ageing well, Liam".

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Using a phrase Liam adopts in his own social media comments, another fan wrote simply "BIBLICAL".

Hundreds of people have complained to the Advertising Standards Authority (ASA) over "misleading claims about availability and pricing".

In response, Sir Keir Starmer has said the government will get a "grip" on the issue of surge pricing, with Culture Secretary Lisa Nandy promising a consultation over the transparency and use of dynamic pricing, and the technology around queuing systems, to ensure fans don't get ripped off.

Yesterday we revealed that official reseller Twickets had lowered its fees after criticism from Oasis fans.

Scroll through today's Money blog for: Cheapest dates to go on holiday this year (6.42 post); how do you get free school meals (7.58 post); pay-per-mile tax proposed (7.38 post)

Basically, free school meals are aimed at making sure the country's more vulnerable youngsters don't go hungry while they're learning in their earlier years.

Children of certain ages automatically qualify without having to apply, but the rules differ across the four nations.

Children whose parents claim certain benefits or asylum support may also be eligible - though an application may be needed.

Free school meals without having to apply

In England, outside of London , all state school children in reception to year two automatically qualify for infant free school meals, while in the capital , all state primary school children up to age 11 qualify for the benefit in the 2024-25 academic year.

In Scotland , all state school children up to primary five (around four to nine years old) get the meals automatically. There are plans for this to be extended to pupils in receipt of the Scottish child payment in primary six and seven from February.

In Wales  all primary school children in state schools can get free meals from September.

Families who claim benefits

If your child falls outside the eligibility criteria for automatic free school meals, they'll still be able to benefit in certain circumstances.

Wherever you are in the UK, your child may be able to get free school meals if you get one or more of the following:

• Income support
• Universal credit
• Income-based jobseeker's allowance
• Income-related employment and support allowance
• Support under part six of the Immigration and Asylum Act 1999
• The guaranteed element of pension credit
• Child tax credit
• Working tax credit (Scotland and Northern Ireland)
• Working tax credit run-on England and Wales) – paid for four weeks after you stop qualifying for working tax credit

There's some specific criteria for families by devolved nation, which we'll break down below...

England and Wales

If you're claiming universal credit, your net household income must be less than £7,400 after tax, and not including any benefits.

Those receiving child tax credit must not also be entitled to working tax credit and must have an annual income of less than £16,190.

If you're classed as having no recourse to public funds - a type of condition placed on temporary visas in the UK - and the parents are able to work, they must have a household income of no more than:

• £22,700 for families outside of London with one child
• £26,300 for families outside of London with two or more children
• £31,200 for families within London with one child
• £34,800 for families within London with two or more children

People claiming universal credit in Scotland must have a household monthly income of no more than £796 (£9,552 per year) to qualify for free school meals. 

Families on child tax credit, but not working tax credit, can get the meals if they earn less than £19,995. For those on both benefits, their income must be no more than £9,552.

Northern Ireland

You may be able to claim free school meals in Northern Ireland if you receive universal credit and your post-tax earnings are £15,000 or less per year.

If you get child tax credit or working tax credit, you can still get free school meals on an annual income of up to £16,190.

How can I claim the meals?

In England, Wales and Scotland, you apply to your local council.

The UK government website has a local authority postcode checker here , which directs you to the council running services in your area. There are similar tools on the Scottish and Welsh government websites.

In Northern Ireland, you can use this form to apply directly to the government.

How many children are eligible - and how much does it cost? 

According to the latest data from the Department for Education, 2.1 million pupils were eligible for free school meals in the 2023-24 academic year - 24.6% of pupils. This was a rise from 23.8% the year before.

According to the London mayor's office, it's estimated that school meals cost £13.25 per week - or £2.65 meal - on average.

It says its free school meals offer for all state-educated primary school children in the capital saves parents around £500 per year.

According to a 2023 report from the IFS, the current system of free school meals in England – both means-tested and universal provision – costs the government around £1.4bn a year.

But separate research from the Food Foundation found that expanding free school meal eligibility to all primary school students could generate around £41bn in direct benefits to students and a further £58bn to the wider economy over 20 years.

Read other entries in our Basically series.. .

Tax receipts from petrol and diesel duty bring in £25bn for the Treasury each year - and questions have been raised about what happens as more drivers go electric.

Today, the public transport charity Campaign for Better Transport (CBT) is proposing that drivers of zero-emission vehicles (ZEVs), such as electric cars, should be charged based on how far they travel.

They are asking Chancellor Rachel Reeves to impose the pay-per-mile scheme, saying it's the solution to a "black hole" that will be created by the loss of fuel duty.

The scheme would not apply to drivers of traditionally fuelled cars.

Under the plan, drivers with a ZEV before the implementation date would be exempt, incentivising the switch to electric vehicles.

Previous governments have found the prospect of introducing per-mile charges - known as road pricing - to be too politically toxic.

But CBT claims it would have public support.

Let us know your thoughts in the comments box - and read more on this story here ...

Summer may be edging towards the rear-view mirror, but that doesn't mean Britons are turning their back on sunshine. 

With many looking to sort an autumn holiday, Expedia has taken a look at the best times to fly and book hotels - with savings of up to £120 if you are savvy. 

Its data is based on average daily rates for lodging and flight prices between 22 September and 21 December this year.

When to book flights for

• Cheapest : 22, 23 or 24 September
• Least busy : 10 or 17 December
• Most expensive : 19, 20 or 21 December
• Busiest : 20 and 21 October

"For the best deals, travellers should look to book their flights 14 to 20 days before travel, saving them on average £120 compared to booking 91 days or more out, or saving £60 compared to booking 60-90 days out," Expedia says. 

"Target the 22-29 September for travel, when average ticket prices (ATPs) for flights are shaping up to be nearly £100 cheaper than the autumn average, and £50 cheaper than summer ATPs."

When to  book a hotel

• Cheapest : 20 November or 11 December
• Most expensive : 14 or 21 October
• Busiest : 23 October or 25 September

"For hotel stays, target the 3-9 November, when average daily rates are £15 cheaper per night than the seasonal average and summer stays," Expedia says. 

The holiday booking site says the most popular autumn destinations have remained largely the same as last year based on the largest number of hotel searches...

• New York, USA
• Paris, France
• Edinburgh, Scotland
• Amsterdam, Netherlands
• Manchester, UK
• Tenerife, Spain
• Birmingham, UK
• Rome, Italy

Despite this, Expedia says savvy Britons are searching out "under the radar" getaway spots.

"Flight searches have surged for Brits looking to discover new, under-the-radar European cities this autumn, such as Tirana (+95%) in Albania and Bucharest (+70%) in Romania, as Brits look to stretch their budgets further by looking outside the popular city break hotspots."

The top 10 destinations with the biggest search increases are:

• Saint Malo, France
• Didim, Turkey
• Syracuse, Italy
• Beijing, China 
• Palermo, Italy
• Tromso, Norway 
• Brescia, Italy 
• Poznan, Poland
• Tangier, Morocco
• Ischia, Italy

The Money blog will return shortly - meantime, why not scroll through some of our best and most popular features below...

Despite traditionally being an affordable staple of British cuisine, the average price for a portion of fish and chips has risen by more than 50% in the past five years to nearly £10, according to the Office for National Statistics.

Sonny and Shane "the codfather" Lee told Sky News of the challenges that owning J-Henry's Fish and Chip Shop brings and why prices have skyrocketed. 

"Potatoes, fish, utilities, cooking oil - so many things [are going up]," he said. 

Shane also said that he is used to one thing at a time increasing in price, but the outlook today sees multiple costs going up all at once.  

"Potatoes [were] priced right up to about £25 a bag - the previous year it was about £10 a bag," Sonny said, noting a bad harvest last year. 

He said the business had tried hake as a cheaper fish option, but that consumers continued to prefer the more traditional, but expensive, cod and haddock. 

"It's hard and we can we can absorb the cost to a certain extent, but some of it has to be passed on," Shane added. 

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