Related by context. Frequent words. (Click for all words.) 81 carbon emission 80 carbon dioxide emissions 78 CO2 emissions 76 carbon emissions 75 greenhouse gas emissions 74 emissions 74 emission 73 greenhouse gas emission 70 greenhouse gas 69 CO2 69 greenhouse gases 68 greenhouse emissions 68 GHG emissions 67 greenhouse gasses 67 emission reduction 65 reduce carbon emissions 64 emission reductions 63 carbon dioxide 62 carbon 62 carbon dioxide CO2 61 reducing carbon emissions 61 Emissions 60 global warming gases 60 GHG 60 tailpipe emissions 59 pollution 57 exhaust emissions 57 NOx 57 sulfur dioxide emissions 56 air pollution 56 mercury emissions 55 nitrogen oxide 53 carbon credits 51 heat trapping gases 51 nitrogen oxides 51 global warming 51 carbon footprint 50 fossil fuel 50 pollutant 50 pollutants 49 zero emission 49 polluting 49 renewable energy 48 mercury pollution 48 polluter 48 climate change 48 sulfur dioxide 47 carbon offsets 47 carbon footprints 47 fossil fuels 46 renewable energies 46 renewables 45 atmospheric carbon dioxide 45 renewable 45 particulate matter 45 reduce greenhouse gas 45 coal fired 45 deforestation 45 Kyoto Protocol 45 emitters 44 polluters 44 CERs 44 carbon neutral 44 acid rain 43 Kyoto accord 43 biomass 43 emitting 42 biofuel 42 emit 42 Carbon 42 efficiency 42 reducing greenhouse gas 41 ecological footprint 41 pollute 41 environmental 41 gases 41 carbon sequestration 41 Kyoto protocol 41 environmentally friendly 41 kWh 41 biofuels 41 RGGI 41 Low Carbon 41 Montreal Protocol 41 bioethanol 41 emitted 41 biogas 40 Energy Efficiency 40 carbon capture 40 Clean Development Mechanism 40 Climate Change 40 Vattenfall 40 cogeneration 40 gigawatts 40 bio fuels 40 environmental impacts 40 Kyoto 40 Climate 40 diesel 40 afforestation 40 Automobile Manufacturers Association