Related by context. Frequent words. (Click for all words.) 92 carbon emissions 91 greenhouse emissions 91 carbon dioxide emissions 90 greenhouse gases 90 emissions 85 GHG emissions 83 greenhouse gas 83 CO2 emissions 81 carbon emission 77 reduce carbon emissions 76 emission reductions 73 emission reduction 73 emission 71 Emissions 69 carbon dioxide 68 mercury emissions 68 CO2 65 global warming 65 carbon 64 climate change 64 carbon footprint 63 pollution 62 air pollution 60 carbon footprints 59 fossil fuels 57 reduce greenhouse gas 57 Kyoto Protocol 56 fossil fuel 55 emitters 55 pollutants 55 reducing greenhouse gas 54 polluters 54 burning fossil fuels 54 renewable energy 54 carbon neutral 53 Kyoto 52 pollutant 52 Climate Change 52 polluter 52 Kyoto protocol 52 biofuels 51 carbon offsets 51 renewables 51 Climate Action 51 deforestation 49 renewable 49 carbon credits 49 carbon sequestration 49 renewable fuels 48 zero emission 48 sulfur dioxide 48 biofuel 48 polluting 48 environmental impacts 48 carbon capture 47 Climate 47 EPA 47 particulate matter 47 alternative fuels 46 Environmental Protection Agency 46 Clean Air 46 coal fired 45 acid rain 45 methane 44 environmental 44 renewable energies 44 environmentally sustainable 44 smog 44 Climate Change IPCC 44 biomass 44 ozone 43 environmental sustainability 43 Renewable energy 43 gases 43 cleaner burning 43 climate 43 environmentally friendly 42 bio fuels 42 Energy Efficiency 42 greenest 42 nuclear arsenals 42 environmentally sound 42 greener 42 Global warming 42 energy 42 soot 41 Global Warming 41 biodiversity 41 Pollution 41 Clean Energy 41 trans fats 41 legally binding 41 ETS 41 gigawatts 41 mercury 40 tar sands 40 ethanol 40 Sustainability 40 toxic chemicals 40 emitter 39 emit