Related by context. Frequent words. (Click for all words.) 37 carbon 26 Carbon 23 emitting 22 fossil 21 eco 21 carbon footprints 21 carbon emissions 20 greener 20 emission 20 carbon neutral 20 emit 19 CO2 emissions 19 carbon emission 19 emissions 19 climate 19 zero emission 19 Climate Change 18 greenhouse gas 18 ETS 18 cellulose 18 soot 17 climate change 17 carbon offsets 17 environmentally friendly 17 carbon credits 17 carbon footprint 17 CO2 16 carbon dioxide emissions 16 fossil fuel 16 reduce carbon emissions 15 greenhouse emissions 15 greenhouse gas emissions 15 Emissions 15 global warming 15 Kyoto Protocol 14 greenhouse gases 14 polluting 14 Climate 14 Kyoto 14 Methane 14 burning fossil fuels 14 combustion 14 carbon dioxide 13 water vapor 13 hydrogen fuel 13 emission reduction 13 Climate Action 13 GHG emissions 13 tar sands 13 emission reductions 12 reduce greenhouse gas 12 reducing greenhouse gas 12 coal 12 Kyoto protocol 12 methane 11 environmentally sustainable 11 fossil fuels 11 biofuels 11 renewable 11 biofuel 11 acid rain 10 deforestation 10 carbon capture 10 bioenergy 10 offsets 10 CDM 9 alternative fuels 9 oilsands 9 pollute 9 emitters 9 bio fuels 9 hydrogen 9 energy 9 renewable energies 9 gases 9 renewables 9 carbon sequestration 9 pollutant 8 solar 8 biodiesel 7 sulfur 7 polluter 7 pollution 7 biomass 7 polluters 7 renewable energy 7 CER 6 emitter 6 ethanol 6 pollutants 6 renewable fuels 6 organics 5 coal fired 5 sulfur dioxide 5 Clean Energy 4 nutrient 4 Biomass 3 Renewable energy 2 nitrogen 2 biodiversity 1 mercury emissions