Related by context. Frequent words. (Click for all words.) 52 Philip Clapp 51 Conservation Voters 50 Frances Beinecke 50 Fred Krupp 46 Jeremy Symons 46 Sierra Club 45 Jason Grumet 45 Audra Parker 44 Jeff Tittel 44 Drevna 44 Repower America 43 Avrim Lazar 43 Joseph Romm 42 global warming 42 Larry Schweiger president 42 Andrew Wetzler 42 Vickie Patton 42 Jeff Tittel director 42 Roland Hwang 42 Luke Popovich 41 greenhouse gases 41 liquefied coal 41 Bruce Nilles 41 Phil Bloomer 41 CAFE standards 41 greenhouse gas emissions 41 fossil fuels 41 greenhouse emissions 40 emmissions 40 James Leape 40 reducing greenhouse gas 40 VPIRG 40 Cavaney 40 commissioner Stavros Dimas 40 Arctic Refuge 40 offshore drilling 40 Kyoto Protocols 39 climate change 39 burning fossil fuels 39 Pachauri 39 Kim Carstensen 39 Minister Sigmar Gabriel 39 regulating greenhouse gases 39 Jonathon Porritt 39 fleetwide average 39 heat trapping carbon emissions 39 enviromental 39 Economy CAFE 39 greenhouse gas 39 renewable fuels 39 Fatih Birol 39 enviros 39 Clean Water Action 38 Chief Executive Andrew Liveris 38 John Sauven 38 carbon dioxide emissions 38 Patru 38 greenhouse emission 38 curbing carbon emissions 38 Klaus Toepfer 38 Waxman Markey 38 Inhofe 38 Barbara Boxer D Calif 38 Renewable fuels 38 combating global warming 38 carbon emissions 38 greenhouse gasses 38 alternative fuels 38 Waxman Markey climate 38 Nancy Sutley 38 reduce greenhouse gas 38 Concerned Scientists UCS 38 CO2 emission 38 heat trapping carbon dioxide 38 GHG emission 37 PennEnvironment 37 Fuel Efficiency 37 emissions 37 David Kolata 37 fossil fuel 37 Worldwatch 37 NPCA 37 combatting global warming 37 DeGette 37 NRDC 37 largest emitter 37 Wildlife Federation 37 Andrew Liveris 37 Environment Commissioner Stavros 37 Eli Pariser executive 37 Dingell 37 LCV 37 Algore 37 Schendler 37 Freudenthal 37 Bob Stallman 37 polluting fossil fuels 37 PennFuture 36 GHG reductions 36 Clean Skies 36 Krenicki