Related by context. Frequent words. (Click for all words.) 72 carbon dioxide emissions 71 carbon emissions 70 CO2 emissions 67 carbon dioxide 66 CO2 64 greenhouse gas emissions 64 carbon emission 63 greenhouse gasses 63 greenhouse gases 61 GHG emissions 61 emissions 60 carbon dioxide CO2 60 carbon footprint 59 greenhouse emissions 59 greenhouse gas 59 reduce carbon emissions 59 carbon 57 reducing carbon emissions 56 carbon footprints 54 GHG 54 greenhouse gas emission 54 emission reductions 51 ecological footprint 51 carbon offsets 51 carbon credits 51 emitted 50 emission 50 emission reduction 50 carbon neutral 49 Emissions 49 nitrogen oxides 48 heat trapping gases 48 burning fossil fuels 47 fossil fuel 47 Carbon dioxide 46 pollution 46 nitrogen oxide 46 pollutants 46 particulate matter 45 emit 45 fossil fuels 45 sulfur dioxide 45 air pollution 44 tailpipe emissions 44 methane 44 exhaust emissions 44 aerosols 44 NOx 43 carbon sequestration 42 atmospheric carbon dioxide 42 climate change 42 kilowatt hours 42 Environment Programme 41 reduce greenhouse gas 41 mercury emissions 41 environmental impacts 41 acid rain 41 gasses 41 particulates 41 global warming 41 kWh 41 pollutant 41 VOCs 41 Low Carbon 40 biomass 40 deforestation 40 ozone 40 biofuel 40 water vapor 39 pollute 39 polluting 39 mercury pollution 39 environmentally friendly 39 soot 39 Kyoto Protocol 38 emitting 38 offsets 38 carbon capture 38 CFCs 38 gases 38 biofuels 38 greening 38 recyclable materials 38 zero emission 38 recyclable 37 renewable energy 37 emitters 37 polluter 37 greenest 37 gas guzzler 36 Carbon 36 biodiversity 36 Climate Action 36 planting trees 36 Climate Change 36 CO 36 emits 36 Climate 36 environmentally sustainable 36 hydrogen 36 toxic chemicals