Related by context. Frequent words. (Click for all words.) 58 greenhouse gases 57 carbon emissions 56 heat trapping greenhouse gases 56 carbon dioxide emissions 56 greenhouse gas emissions 55 heat trapping gases 55 greenhouse emissions 53 emission allowances 53 greenhouse gasses 53 emissions 52 heat trapping pollution 51 global warming gases 51 greenhouse gas 51 emit greenhouse gases 50 emission reductions 50 carbon dioxide 50 CO2 emissions 50 greenhouse gas emission 49 reducing carbon emissions 49 reduce carbon emissions 49 emission reduction 48 mercury emissions 48 fossil fuels 48 carbon dioxide emission 48 Kyoto accord 48 carbon emission 48 carbon 47 mercury pollution 47 greenhouse gas emitters 47 greenhouse gas GHG emissions 47 CO2 47 GHG emissions 46 fossil fuel 46 tailpipe emissions 46 Waxman Markey 45 legally binding treaty 45 emitters 45 Kyoto treaty 45 emission 45 global warming 45 carbon dioxide emitted 44 polluters 44 carbon dioxide CO2 emissions 44 nitrogen oxide emissions 44 greenhouse gases emitted 44 Kyoto Protocol 44 carbon dioxide CO2 44 Kyoto pact 43 reduce greenhouse gas 43 CO2 emission 43 burning fossil fuels 43 gases blamed 43 reducing CO2 emissions 42 coal fired 42 carbon capture 42 nuclear warheads 42 carbon emitting 42 sulfur dioxide emissions 42 renewable energy 42 renewables 42 climate change 42 Kyoto protocol 42 windfall profits 42 regulating greenhouse gases 42 GHGs 41 pollution 41 strategic nuclear warheads 41 corn ethanol 41 Copenhagen Accord 41 poorer nations 41 CAFE standards 40 nitrogen oxides 40 cleaner fuels 40 heat trapping 40 polluting 40 strategic warheads 40 Regional Greenhouse Gas 40 atmospheric CO2 39 coal 39 biofuels 39 carbon credits 39 renewable fuels 39 polluting industries 39 polluter 39 Clear Skies 39 combating global warming 39 electric utilities 39 biofuel crops 39 reducing greenhouse gas 39 wealthiest Americans 39 atmospheric carbon dioxide 39 HFCs 38 gas guzzling vehicles 38 enrich uranium 38 carbon sinks 38 nuclear weapons 38 pollutants 38 absorb carbon dioxide 38 differentiated responsibilities 38 GHG 38 carbon sequestration