Related by context. Frequent words. (Click for all words.) 59 Sierra Club 55 Bruce Nilles 54 Mike Hudema 52 greenhouse gases 51 Frances Beinecke 51 greenhouse gas 51 greenhouse gasses 51 Vickie Patton 50 Greenpeace 50 potent greenhouse gas 49 environmentalists 49 Walhi 49 Neil Carman 48 greenhouses gases 48 enviromental 48 carbon dioxide emissions 48 Doug Honnold 48 Jared Blumenfeld 48 climate change 48 commissioner Stavros Dimas 48 Wildlife Federation 48 CO2 48 NRDC 48 Schendler 48 Audra Parker 48 emmissions 48 greenhouse gas emissions 48 Co2 48 co2 47 greenhouse gases GHG 47 pollution 47 carbon dioxide 47 SeaWeb 47 Philip Clapp 47 Appalachian Voices 47 Wildsight 47 Fred Krupp 47 Jeff Tittel director 47 Jonathon Porritt 47 global warming 47 heat trapping carbon dioxide 47 environmental 46 Mitloehner 46 Greenhouse Gases 46 Carbon Dioxide 46 Ecoterra International 46 emissions 46 Ecojustice 46 Forest Guardians 46 Andrew Wetzler 46 polluter 46 Kim Carstensen 46 pollutants emitted 46 boreal 46 Wilderness Society 46 Tread Lightly 46 Pollution Probe 45 Burning fossil fuels 45 Environment Programme 45 environmentalist 45 David Bookbinder 45 carbon emissions 45 VPIRG 45 Delaware Riverkeeper Network 45 CPAWS 45 BUND 45 CO ² 45 GHGs 45 Conservation Voters 45 Frank Maisano 45 Senator Christine Milne 45 Futurewise 45 emit CO2 45 Carbon Offset 44 WWF 44 reduce carbon emissions 44 Wilderness Workshop 44 conservationists 44 enviros 44 Climate Action 44 Greenhouse gases 44 Terry Tamminen 44 Jeremy Symons 44 greenhouse emissions 44 Sheila Watt Cloutier 44 Natural Resources Defense 44 Ronnie Cummins 44 Luke Popovich 44 absorbing carbon dioxide 44 Jeff Tittel 44 greenhouse gas GHG 44 GHG 44 conserving biodiversity 44 tree huggers 44 polluting 44 Beyond Pesticides 44 greenhouse gases GHGs 44 smog forming 44 polluters 44 PennEnvironment 44 Nitrogen oxides