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EurekAlert 315 International Union 237 World Resources Inst 188
United States Depart 177 World Business Counc 145 US Geological Survey 121
Water Environment Fe 117 World Wide Fund for 117 United Nations Envir 103
us environmental pro 101 US Geological Survey 86 Institute for Europe 81
Imperial College Lon 76 Department of the En 68 Ministry for the Env 60
RAND Corporation 58 US Environmental Pro 57 Energy and Resources 55
Scripps Institution 55 Global Environment F 53