Related by context. Frequent words. (Click for all words.) 69 greenhouse gas emission 68 greenhouse gas GHG emissions 67 carbon emission 65 greenhouse gas emissions 65 GHG emissions 64 emission reduction 63 greenhouse gas 63 greenhouse emissions 63 greenhouse gas GHG 62 carbon emissions 62 emissions 62 CO2 emissions 62 carbon dioxide emissions 61 emission reductions 61 CO2 emission 60 GHG 60 carbon dioxide emission 60 emission 59 greenhouse gases 58 nitrous oxide emissions 58 GHGs 57 greenhouse gasses 57 carbon dioxide CO2 emissions 57 C# emissions 56 Greenhouse Gas Emissions 54 Emissions 54 reduce carbon emissions 54 CO2 53 reducing carbon emissions 53 carbon 53 Greenhouse Gas 51 particulate emissions 51 greenhouses gases 50 reducing CO2 emissions 50 global warming gases 50 carbon emitted 50 Emission 49 pollutant emissions 49 carbon footprints 49 greenhouse gases emitted 49 carbon emitting 49 Kyoto protocol 49 heat trapping carbon dioxide 49 climate change 49 NOx emissions 48 carbon sequestration 48 biofuels 48 Kyoto Protocol 48 exhaust emissions 48 biofuel 48 curbing greenhouse gases 48 heat trapping emissions 48 greenhouse gas emitters 48 megatonnes 48 carbon dioxide emitted 48 renewable energy 47 carbon dioxide CO2 47 Montreal Protocol 47 bioenergy 47 warming gases 47 Carbon dioxide emissions 47 carbon emitters 47 carbon footprint 47 tailpipe emissions 47 Kyoto Accord 47 NOx 47 ozone depleting substances 47 bio fuels 46 fossil fuel 46 renewables 46 heat trapping gases 46 Renewable Portfolio Standard 46 Greenhouse Gases 46 Climate Change 46 CARB 46 Kyoto accord 45 mercury emissions 45 Renewable Fuels Standard 45 carbon credits 45 trade distorting subsidies 45 carbon dioxide 45 nitrogen oxide emissions 45 biofuel crops 45 HCFCs 45 sulfur dioxide emissions 45 UNFCCC 44 emitters 44 tariff 44 Carbon Dioxide 44 renewable fuels 44 import tariff 44 reduce greenhouse gas 44 biomass 44 fossil fuels 44 deforestation 44 renewable 44 Biofuel 43 renewable energies 43 Kyoto 43 Kyoto Treaty 43 CAFE standards