Economic aspects Government policy Emigration and immigration 103 Climatic changes 69 Economic conditions 47 Environmental aspects 46 Social aspects 44 more ... Technological innovations 38 Foreign workers 35 Environmental policy 31 Political aspects 31 Globalization 30 Agriculture 29 Economic development 28 Immigrants 25 Energy policy 22 History 22 Law and legislation 20 Economic policy 17 Global warming 16 Greenhouse gas mitigation 16 Small business 16 Information technology 15 Poverty 15 International cooperation 14 Older people 14 Produce trade 14 Social conditions 14 Agriculture and state 13 Renewable energy sources 13 less ...