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共83条，第1-20条
World Wide Fund for 133 International Union 82 Institute for Europe 81
United States Depart 60 World Resources Inst 59 EurekAlert 57
United Nations Envir 53 Department for Envir 45 Global Environment F 45
Department of Conser 40 Scripps Institution 31 World Business Counc 31
Department of the En 22 future earth 21 UN Sustainable Devel 20
Eco-Business Researc 17 Plymouth Marine Labo 17 us environmental pro 17
Energy and Resources 15 Government of Canada 14