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World Resources Inst 113 World Wide Fund for 38 EurekAlert 34
United States Depart 33 United Nations Envir 29 World Business Counc 26
UN Sustainable Devel 24 Department for Envir 23 Global Environment F 22
Institute for Europe 21 United Nations Food 21 future earth 20
US Geological Survey 17 International Union 15 Science 15
gov.uk - environment 15 Department of Conser 13 Environmental Monito 13
European Geosciences 13 Association of Ameri 12