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EurekAlert 184 Science X network 154 EurekAlert! - Earth 136
Department of Energy 16 German Aerosapce Cen 10 Minging.com 9
European Space Agenc 8 US Department of Ene 6 Commonwealth Scienti 5
Center for Strategic 4 International Energy 3 BP Global 2
Centre national de l 2 European Centre for 2 Natural Resource can 2
Organization for Eco 2 U.S. Energy Informat 2 Institute for Global 1
National Center of A 1 US Geological Survey 1