Related by context. Frequent words. (Click for all words.) 72 carbon dioxide emission 69 CO2 emission 67 CO2 emissions 66 carbon emission 65 emission 64 carbon dioxide emissions 64 GHG emission 62 emissions 62 carbon dioxide CO2 emissions 62 carbon emissions 61 C# emissions 61 pollutant emissions 61 greenhouse gas emissions 60 greenhouse gas emission 58 greenhouse gas 58 CO2 58 CO2 emitted 58 CO ² 58 carbon emission reductions 58 greenhouse gas GHG emissions 57 Emissions 56 carbon dioxide CO2 56 greenhouse gases 56 exhaust emission 55 sulfur dioxide SO2 55 greenhouse emissions 55 Carbon dioxide emissions 55 emission reduction 55 exhaust emissions 55 greenhouse gasses 55 GHG reduction 55 carbon emitted 54 GHG emissions 54 greenhouse gas GHG 54 reducing carbon emissions 54 reduce carbon emissions 54 smog forming emissions 54 particulate emissions 54 greenhouse gas emission reductions 54 CO2 Emissions 54 GHGs 53 reducing CO2 emissions 53 tailpipe emissions 53 NOx emissions 53 carbon dioxide emitted 52 particulate matter emissions 52 Co2 52 emission reductions 52 carbon 52 nitrous oxide emissions 52 Emission 52 pollution 52 heat trapping carbon dioxide 52 carbon dioxide 51 sulfur dioxide emissions 51 greenhouses gases 51 global warming gases 51 emit carbon dioxide 50 carbon emitting 50 NOx 49 nitrous oxides 49 nitrogen oxide 49 nitrogen oxide NOx 49 CO2e 49 GHG 49 nitrogen oxides NOx 49 nitrogen oxide emissions 49 SO2 48 sulfur fuels 48 mercury emissions 48 air pollution 48 megatonnes 48 ozone depleting chemicals 47 greenhouse gases emitted 47 airborne pollutants 47 Greenhouse gases 46 dioxide 46 kilotonnes 46 VOC emissions 46 g km 46 gigatonnes 46 Emissions Trading Scheme ETS 46 Carbon Emissions 46 HCFC 46 particulate matter PM 46 cleaner fuels 46 fleetwide average 45 sulfur dioxide 45 Environment Commissioner Stavros 45 Bioethanol 45 metric ton 45 heat trapping emissions 45 tonne 45 BlueMotion 45 gases emitted 45 Greenhouse Gas Emissions 45 fossil fuel 45 autocatalysts 45 heat trapping gases 45 atmospheric carbon dioxide 45 heat trapping greenhouse gas