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United States Depart 108 Science X network 91 EurekAlert 88
Environment & Energy 33 US Geological Survey 29 EurekAlert! - Earth 26
Science Daily 21 EurekAlert! 16 Department of Energy 15
Science 15 us environmental pro 11 Environmental Monito 10
Water Environment Fe 10 RAND Corporation 9 Environmental Protec 8
US Environmental Pro 8 U.S. Energy Informat 7 US National Scientif 7
Association of Ameri 6 The Associated Press 5