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United States Depart 131 Science X network 95 EurekAlert 93
US Geological Survey 44 US Geological Survey 43 EurekAlert! - Earth 34
Environment & Energy 30 us environmental pro 30 EurekAlert! 21
Science Daily 20 US Department of Ene 18 US Environmental Pro 13
Environmental Monito 9 RAND Corporation 9 Scientific American 8
Water Environment Fe 6 U.S. Energy Informat 5 US National Scientif 5
World Resources Inst 5 Environmental Protec 4