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共73条，第1-20条
United States Depart 161 EurekAlert 126 RAND Corporation 118
Science X network 99 World Resources Inst 88 Department of Energy 52
Science Daily 41 Science 35 EurekAlert! 31
EurekAlert! - Earth 28 Scientific American 27 Bureau of Ocean Ener 17
Scripps Institution 15 The Associated Press 15 Water Environment Fe 14
U.S. Energy Informat 12 US Environmental Pro 11 us environmental pro 11
World Business Counc 9 Climate Policy Initi 8