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Global warming Climatic changes 34 Greenhouse effect, Atmospheric 10 Economic aspects 7 Government policy 6 Environmental aspects 5 Greenhouse gas mitigation 4 Greenhouse gases 4 Law and legislation 4 Environmental economics 3 Environmental policy 3 Environmental protection 3 Political aspects 3 Prevention 3 Social aspects 3 Carbon dioxide mitigation 2 Climate 2 Mass media and the environment 2 Research 2 Bioclimatology 1 Biodiversity 1 Biodiversity conservation 1 Carbon dioxide 1 Citizen participation 1 Climate change mitigation 1 Climatic factors 1 Consumption (Economics) 1 Crops and climate 1 Denial (Psychology) 1 Economic development 1