Environmental aspects Economic aspects 8 Economic development -- 7 International trade -- 7 International economic relations 5 Social aspects 5 Climatic changes -- 4 more ... Environmental policy 4 Environmental policy -- 4 Sustainable development 4 Developing countries 3 Free trade -- 3 Globalization -- 3 International cooperation 3 Political aspects 3 Economic conditions 2 Economic policy 2 Energy policy -- 2 Foreign relations 2 Globalization 2 International relations -- 2 Biological warfare 1 Biological weapons -- 1 Capitalism 1 Chemical warfare 1 Climate cjanges -- 1 Climatic chnage -- 1 Commercial policy 1 Comparative government 1 Competition, International 1 less ...