Related by context. Frequent words. (Click for all words.) 59 emit 59 carbon emission 57 pollute 56 greenhouse gases 56 carbon dioxide emissions 55 carbon emissions 55 emissions 55 carbon credits 55 carbon dioxide 54 emission 54 CO2 emission 53 greenhouse gas 53 carbon 51 polluters 51 greenhouse gas emissions 51 greenhouse gasses 51 CO2 51 CO2 emissions 51 carbon dioxide CO2 51 heat trapping gases 50 Emissions 50 emission reduction 49 greenhouse gas emission 49 fossil fuels 49 emitters 48 emission reductions 48 burning fossil fuels 47 fossil fuel 47 carbon offsets 47 Clean Development Mechanism 47 reduce carbon emissions 46 greenhouse emissions 46 nitrogen oxides 46 EU ETS 46 Carbon dioxide 46 nitrogen oxide 46 polluting 45 global warming gases 45 emitting 45 sulfur dioxide emissions 44 sulfur dioxide 44 polluting industries 44 GHG emissions 44 CERs 43 coal fired 43 reducing carbon emissions 43 GHG 43 Emission 43 pollution 42 polluter 42 cleaner fuels 42 tailpipe emissions 42 renewable energy 42 cleaner burning 42 pollutant 42 nitrogen oxide emissions 41 biofuels 41 gases 41 RGGI 41 biofuel 41 renewables 41 regulate greenhouse gases 40 acid rain 40 pollutants 40 NOx 40 biomass 40 exhaust emissions 40 mercury emissions 40 renewable 39 carbon capture 39 emitted 39 carbon sequestration 39 Kyoto accord 39 HFCs 39 flue gas 39 Kyoto Protocol 38 Renewable 38 Low Carbon 38 Climate Change 38 coal 38 air pollution 38 gasses 38 bio fuels 37 coal combustion 37 Kyoto protocol 37 renewable energies 37 methane 37 internal combustion engines 37 kilowatt hour 37 solar thermal 37 Carbon 37 Biofuel 37 Methane 37 CFCs 37 baseload 37 externalities 37 mercury pollution 37 Renewable energy 36 IGCC 36 combustion 36 synthetic fuels