Government policy History 298 Emigration and immigration 249 Prevention 142 Law and legislation 137 Social aspects 121 Political aspects 115 more ... Economic aspects 110 Politics and government 110 Terrorism 108 Social conditions 101 Climatic changes 96 Women 81 Immigrants 73 Foreign relations 70 Environmental policy 65 International cooperation 62 Social policy 58 Water-supply 58 Environmental aspects 56 Management 51 Moral and ethical aspects 51 Water resources development 49 Economic conditions 48 National security 46 Noncitizens 45 Public welfare 42 Sustainable development 42 Legal status, laws, etc 41 Refugees 41 less ...