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EurekAlert 346 Science X network 286 United States Depart 129
Science Daily 111 Environment & Energy 106 The Center for Syste 81
EurekAlert! 74 EurekAlert! - Earth 67 Science 58
US Geological Survey 43 us environmental pro 42 RAND Corporation 31
US Environmental Pro 31 Environmental Monito 30 The Associated Press 27
US National Scientif 27 Environmental Health 25 US Department of Ene 24
US Geological Survey 19 Department of Energy 18