Sustainable development Environmental aspects 7 Economic development 4 Economic policy 4 Environmental policy 4 Economic conditions 3 Government policy 3 Human ecology 3 Management 3 Natural resources 3 Conservation of natural resources 2 Dissertations, Academic 2 Intellectual life 2 International cooperation 2 International economic relations 2 Social conditions 2 Social policy 2 Thesis 2 Business enterprises 1 Cities and towns 1 Climatic changes 1 Democracy Developing countries 1 Developing countries 1 Econometric models 1 Economic aspects 1 Economic assistances 1 Economic condition 1 Enviromental economics 1 Enviromental policy 1 Environemtnal responsibility 1