Related by context. Frequent words. (Click for all words.) 78 carbon dioxide emissions 71 carbon dioxide 70 carbon emissions 69 CO2 emissions 68 greenhouse gases 67 greenhouse gas emissions 66 CO2 63 emissions 62 greenhouse gas 62 carbon emission 62 reduce carbon emissions 61 greenhouse emissions 60 GHG emissions 57 carbon 56 carbon footprint 52 emission reductions 52 emission 51 Emissions 51 fossil fuel 50 pollutants 50 fossil fuels 50 emission reduction 50 carbon neutral 50 burning fossil fuels 50 pollution 49 carbon footprints 49 emitted 48 mercury emissions 47 air pollution 46 emit 46 sulfur dioxide 46 methane 45 reduce greenhouse gas 45 carbon credits 44 pollutant 43 carbon capture 43 biomass 43 carbon offsets 43 renewable energy 43 global warming 42 particulate matter 42 landfills 42 coal fired 42 polluter 42 kilowatt hours 42 gases 42 renewable 41 renewables 41 zero emission 41 biofuel 41 climate change 41 hydrogen 40 polluting 40 reducing greenhouse gas 40 water vapor 40 volatile organic compounds 39 emitting 39 recycle 39 polluters 39 emitters 39 environmentally friendly 39 Climate Action 38 biofuels 38 landfill 38 acid rain 38 toxic chemicals 38 energy 38 environmental impacts 38 pollute 38 renewable fuels 38 kWh 38 emits 37 hazardous waste 37 bio diesel 37 renewable energies 37 biogas 37 waste 37 soot 37 Carbon 37 alternative fuels 37 hydrogen powered 37 recycling 37 bio fuels 37 ozone 36 Climate Change 36 solar cells 36 methane gas 36 internal combustion engine 36 aerosols 36 biodiesel 36 hazardous chemicals 36 hydrogen fuel 36 solar panels 36 kilowatt hour 35 cleaner burning 35 bioenergy 35 gigawatts 35 recycled 35 deforestation 35 recycles 35 greener