Government policy Emigration and immigration -- 5 Government policy -- 4 Refugees -- 4 Climatic changes -- 3 Environmental aspects 3 Global warming -- 3 more ... Immigrants -- 3 Greenhouse gas mitigation -- 2 Prevention 2 Terrorism -- 2 Alien labor -- 1 British -- 1 Climate change 1 Climatic changes 1 Commerce -- 1 Competition, International 1 Cyberspace 1 Cyberspace -- 1 Democracy 1 Economic aspects 1 Economic development -- 1 Economic policy 1 Environment responsibility 1 Finance -- 1 Globalization 1 Government publications -- 1 Greenhouse gas mitigation 1 Greenhouse gases -- 1 History 1 less ...