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EurekAlert 365 Natural Resource can 157 Environment and Clim 144
Minging.com 123 Government of Canada 104 Science Daily 100
Convention on Biolog 50 world meteorological 27 E3G 26
Science 25 Center for Strategic 20 The Associated Press 20
U.S. Energy Informat 20 European Space Agenc 19 RAND Corporation 17
UN Sustainable Devel 16 Imperial College Lon 15 future earth 13
United Nations Envir 12 Canadian Institute o 10