Environmental aspects Environmental policy Economic development -- 8 Environmental protection 3 International cooperation 3 Climatic changes -- 2 Economic conditions 2 more ... Environment and state 2 Environmental policy -- 2 International relations -- 2 Management 2 Natural resources -- 2 Sustainable development 2 Commercial policy -- 1 Ecology 1 Environmental economics 1 Environmental management 1 Environmental protection -- 1 Free trade -- 1 Global warming -- 1 Government policy 1 Government purchasing -- 1 Green product -- 1 Greenhouse gases -- 1 International trade -- 1 Marine resources conservation -- 1 Maritime law 1 Prevention -- 1 Protectionism -- 1 Social policy -- 1 less ...