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World Resources Inst 117 United Nations Envir 75 EurekAlert 64
Environmental Protec 63 Department for Envir 61 us environmental pro 50
Imperial College Lon 46 World Business Counc 38 UN Sustainable Devel 36
The European Environ 35 Department for Busin 29 Natural Environment 28
US Environmental Pro 27 RAND Corporation 25 Environmental Monito 23
Scripps Institution 23 UK Environment Agenc 23 Institute for Europe 22
Energy and Resources 21 Federal Environment 20