Related by context. Frequent words. (Click for all words.) 77 emissions 76 greenhouse gas emissions 73 carbon emissions 73 carbon dioxide emissions 73 greenhouse emissions 72 greenhouse gas GHG emissions 71 CO2 emissions 71 GHG emissions 71 carbon emission 69 greenhouse gases 68 emission 67 emission reductions 67 greenhouse gas emission 66 carbon dioxide emission 66 greenhouse gasses 65 greenhouse gas 64 GHGs 64 GHG 64 CO2 emission 63 emission reduction 62 carbon dioxide CO2 emissions 62 reduce carbon emissions 61 Emissions 60 nitrogen oxide emissions 60 reducing carbon emissions 60 global warming gases 60 CO2 60 carbon dioxide emitted 60 sulfur dioxide emissions 59 mercury emissions 57 carbon 57 heat trapping gases 57 carbon dioxide 57 reducing CO2 emissions 56 carbon dioxide CO2 56 exhaust emissions 55 tailpipe emissions 54 pollution 54 Emission 53 NOx 52 nitrogen oxide 51 carbon footprint 51 mercury pollution 51 carbon emitting 51 air pollution 51 nitrogen oxides 50 Greenhouse Gas 50 heat trapping greenhouse gases 50 pollutants 50 SO2 49 carbon footprints 49 emitters 49 Carbon Dioxide 48 reduce greenhouse gas 48 sulfur dioxide 46 particulate matter 45 fossil fuels 45 Kyoto accord 45 acid rain 45 reducing greenhouse gas 45 Kyoto Protocol 45 climate change 44 polluters 44 carbon credits 44 pollutant 44 polluting 44 atmospheric carbon dioxide 44 fossil fuel 44 Kyoto 43 burning fossil fuels 43 ecological footprint 43 deforestation 43 VOCs 43 carbon sequestration 43 global warming 42 renewables 42 combating global warming 42 particulates 42 emission allowances 42 atmospheric CO2 42 polluting industries 42 gases 42 EU ETS 42 renewable energy 42 carbon offsets 42 Waxman Markey 41 Kyoto protocol 41 polluter 41 gases blamed 41 #ppm [001] 41 carbon sinks 41 nitrogen dioxide 41 offsets 40 cleaner fuels 40 ozone pollution 40 zero emission 40 ozone 40 Kyoto pact 40 Emissions Trading Scheme 40 carbon neutrality 39 HFCs