Related by context. Frequent words. (Click for all words.) 72 CO2 emissions 72 reducing carbon emissions 65 reduce carbon emissions 65 carbon dioxide emissions 63 emissions 63 carbon emissions 63 CO2 emission 62 greenhouse gas emissions 60 greenhouse emissions 60 GHG emissions 59 emission reduction 59 reducing greenhouse gas 58 CO2 57 carbon emission 56 greenhouse gases 56 emission 55 emission reductions 54 greenhouse gas emission 54 greenhouse gas 54 greenhouse gasses 54 Emissions 53 carbon footprint 53 exhaust emissions 53 reduce greenhouse gas 51 nitrogen oxide emissions 51 GHG 51 tailpipe emissions 51 carbon dioxide 51 zero emission 50 NOx 49 Low Carbon 49 carbon dioxide CO2 48 global warming gases 48 carbon footprints 47 environmentally friendly 47 nitrogen oxide 46 Energy Efficiency 46 renewables 46 environmental sustainability 46 carbon neutral 45 EVs 45 fossil fuels 45 carbon 44 Emission 44 renewable energies 44 efficiency 43 Kyoto accord 43 Kyoto Protocol 43 biofuels 43 environmentally sound 43 renewable energy 43 renewable 43 alternative fuels 43 mercury emissions 42 Sustainability 42 fossil fuel 42 Kyoto protocol 42 emitters 42 climate change 42 greener 42 nitrogen oxides 42 cleaner fuels 42 reducing 42 pollution 42 Sustainable Development 42 Climate Change 41 sustainability 41 Hydrogen 41 smart grids 41 sulfur dioxide emissions 41 carbon sequestration 41 pollutants 41 burning fossil fuels 41 emitting 41 combustion engine 40 COP# [001] 40 biofuel 40 heat trapping gases 40 pollutant 40 EU ETS 40 Clean Air 40 environmentally sustainable 40 Renewable energy 40 environmentally 40 environmentally responsible 40 Global Compact 40 air pollution 40 greening 40 C# [001] 40 environmentally conscious 40 Climate Action 39 carbon capture 39 diesel engines 39 polluter 39 Climate Protection 39 Efficiency 39 bioethanol 39 atmospheric carbon dioxide 39 Fuel Economy 39 polluting 39 carbon offsets