Related by context. Frequent words. (Click for all words.) 85 greenhouse gas emissions 82 emissions 80 carbon dioxide emissions 80 carbon emissions 79 CO2 emissions 78 GHG 78 greenhouse emissions 76 greenhouse gases 75 greenhouse gas 75 carbon emission 74 greenhouse gasses 74 emission reductions 73 greenhouse gas emission 72 emission reduction 69 reduce carbon emissions 69 Emissions 67 emission 66 CO2 66 carbon footprint 66 reducing carbon emissions 62 carbon dioxide 61 carbon footprints 60 mercury emissions 59 tailpipe emissions 58 heat trapping gases 58 carbon dioxide CO2 57 carbon 57 NOx 56 nitrogen oxides 55 pollution 54 air pollution 53 nitrogen oxide 52 pollutants 52 mercury pollution 51 climate change 51 fossil fuel 51 fossil fuels 51 carbon neutral 50 global warming 50 environmental impacts 50 pollutant 49 reduce greenhouse gas 49 emitters 48 carbon offsets 48 polluter 48 Kyoto Protocol 48 renewables 48 carbon sequestration 48 sulfur dioxide 48 burning fossil fuels 48 renewable energy 47 reducing greenhouse gas 47 particulate matter 47 CARB 47 carbon credits 47 VOCs 46 Montreal Protocol 46 Climate Change 46 Clean Air 46 renewable 45 polluters 45 environmental sustainability 45 biofuels 45 EPA 44 carbon capture 44 volatile organic compounds 44 Energy Efficiency 44 Climate Action 43 zero emission 43 biofuel 43 environmentally sound 43 UNFCCC 43 Low Carbon 43 environmentally responsible 43 biomass 43 Kyoto protocol 42 Kyoto 42 renewable fuels 42 methane 42 ozone 41 alternative fuels 41 Sustainability 41 polluting 41 CFCs 41 particulates 41 environmentally friendly 40 environmentally sustainable 40 Carbon dioxide 40 renewable energies 40 deforestation 40 sustainability 40 gases 40 carcinogens 40 consumption 40 bio fuels 39 Copenhagen Accord 39 Pollution 39 Climate 39 Environmental Protection Agency 39 gasses 39 kWh