Related by context. Frequent words. (Click for all words.) 83 greenhouse gas emissions 81 emissions 81 carbon emission 80 greenhouse gas 76 emission 76 greenhouse emissions 76 greenhouse gases 76 emission reduction 76 carbon emissions 74 carbon dioxide emissions 74 emission reductions 73 GHG emissions 70 GHG 68 CO2 emissions 65 Emissions 63 heat trapping gases 63 reduce carbon emissions 61 reducing carbon emissions 60 CO2 60 mercury emissions 60 carbon 59 pollution 58 air pollution 58 carbon dioxide 57 carbon credits 56 Kyoto Protocol 56 emitters 56 polluters 55 Kyoto protocol 54 climate change 53 carbon offsets 53 renewable energy 53 global warming 51 reducing greenhouse gas 50 pollutant 50 reduce greenhouse gas 50 nitrogen oxides 50 Kyoto 49 renewables 49 fossil fuel 49 pollutants 49 fossil fuels 49 polluter 48 zero emission 48 carbon sequestration 47 Climate Change 47 carbon footprints 47 carbon footprint 47 renewable 47 biofuel 46 coal fired 46 Climate Action 46 environmental 46 carbon capture 46 biofuels 46 cleaner burning 46 deforestation 46 EPA 46 smog 46 Clean Air 45 CDM 45 sulfur dioxide 44 biomass 44 polluting 44 carbon neutral 44 Environmental Protection Agency 44 particulate matter 44 alternative fuels 44 renewable fuels 43 environmental impacts 43 Copenhagen Accord 43 renewable energies 43 ozone 43 Pollution 43 acid rain 42 Air Quality 42 Climate 42 burning fossil fuels 42 Climate Change IPCC 41 coal 41 Renewable energy 41 Energy Efficiency 40 bioethanol 40 import tariffs 40 soot 40 climate 40 biodiesel 40 diesel 40 bio fuels 40 legally binding 39 mpg 39 methane 39 environmentalists 39 gigawatts 39 Biofuel 39 bioenergy 39 CAFE 39 emitter 39 EVs 39 Environment 39 environmentally sustainable