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EurekAlert 813 United States Depart 373 RAND Corporation 269
Science Daily 215 Science 169 U.S. Energy Informat 161
UN Sustainable Devel 158 Center for Strategic 112 Bruegel 70
National Academies P 63 The Associated Press 61 Minging.com 57
United Nations Envir 54 world meteorological 52 Convention on Biolog 46
World Resources Inst 42 Resources for the Fu 38 US Environmental Pro 36
E3G 31 Scientific American 26