Environmental aspects Economic development 35 Pollution 20 Sustainable development 16 Environmental policy 14 Social aspects 13 Health aspects 12 Economic aspects 11 Economic conditions 11 Economic policy 11 Toxicology 10 Developing countries 9 Globalization 9 Bioremediation 8 Biotechnology 8 City planning 7 Climatic changes 7 Environmental protection 7 India 7 Labour economics 7 Poverty 7 Agriculture 6 Population 6 Ecology 5 Global environmental change 5 Human ecology 5 International economic relations 5 Management 5 Water 5 Environmentalism 4