Related by context. Frequent words. (Click for all words.) 74 greenhouse gas emissions 74 GHG emissions 73 emissions 72 greenhouse gas emission 72 carbon emission 72 greenhouse gas GHG emissions 71 carbon dioxide emissions 71 emission reduction 71 emission reductions 71 greenhouse gas 70 greenhouse emissions 70 GHG 69 carbon emissions 68 CO2 emissions 68 GHGs 68 emission 68 greenhouse gases 67 CO2 emission 65 greenhouse gasses 61 CO2 61 reduce carbon emissions 60 carbon dioxide CO2 emissions 60 Emissions 58 reducing carbon emissions 57 Emission 57 nitrogen oxide emissions 57 global warming gases 56 tailpipe emissions 56 heat trapping gases 55 mercury emissions 55 reducing CO2 emissions 55 NOx 55 carbon 55 Greenhouse Gas 54 carbon dioxide 53 sulfur dioxide emissions 53 exhaust emissions 53 carbon dioxide CO2 52 air pollution 52 pollution 51 nitrogen oxides 51 fossil fuel 50 renewables 50 nitrogen oxide 50 global warming 49 climate change 49 emitters 49 renewable 49 renewable energy 49 carbon sequestration 49 reduce greenhouse gas 49 Kyoto Protocol 49 CARB 48 carbon footprints 48 carbon footprint 48 pollutants 48 fossil fuels 48 reducing greenhouse gas 47 particulate matter 47 biofuels 47 EU ETS 47 cleaner fuels 47 Kyoto protocol 47 biomass 47 mercury pollution 46 pollutant 46 carbon credits 46 EPA 46 Kyoto accord 46 carbon neutrality 46 CAFE standards 46 SO2 46 biofuel 46 ecological footprint 45 atmospheric carbon dioxide 45 environmental impacts 45 UNFCCC 45 carbon offsets 44 zero emission 44 CDM 44 Energy Efficiency 44 renewable fuels 44 Low Carbon 44 ozone depletion 43 carbon capture 43 HFCs 43 bio fuels 43 alternative fuels 43 EPRI 43 emission allowances 43 anthropogenic 43 Montreal Protocol 43 Climate Change 42 carbon sinks 42 combating global warming 42 bioenergy 42 Renewable 42 methane 42 VOCs 42 CERs 42 environmental