Environmental aspects -- Environmental policy -- Economic development -- 3 Conservation of natural resources -- 2 Environmental protection -- 2 Agriculture -- 1 Case Studies 1 more ... Costs -- 1 Developing countries -- 1 Economic aspects -- 1 Economic policy -- 1 Energy policy -- 1 Environment 1 Government policy -- 1 Natural resources -- 1 Pacific Area 1 Petroleum industry and trade -- 1 Sustainable development -- 1 Water quality management -- 1 less ...