Related by context. Frequent words. (Click for all words.) 57 chlorofluorocarbons 54 HCFCs 53 HFCs 52 CFCs 50 ozone depleting substances 50 refrigerants 49 greenhouse gases 49 Greenhouse gases 49 greenhouse gas 47 Montreal Protocol 46 heat trapping gases 45 ozone depletion 45 greenhouse gasses 45 Carbon dioxide emissions 45 carbon emitters 44 heat trapping emissions 44 greenhouse gas emission 44 carbon dioxide methane 44 GHGs 44 greenhouse gas emissions 44 polluters 44 emission reduction 43 greenhouse gases emitted 43 burning fossil fuels 43 carbon emission 43 Clean Development Mechanism 43 carbon dioxide CO2 emissions 42 emit carbon dioxide 42 environmentally harmful 42 carbon dioxide CO2 42 refrigerant 42 greenhouse gas emitters 42 carbon dioxide 42 Kyoto Protocol 42 ozone layer 41 Kyoto accord 41 polluting industries 41 carbon dioxide emission 41 global warming gases 41 emission 41 global warming 41 carbon dioxide emissions 41 emissions 41 fossil fuels 41 Kyoto pact 41 heat trapping greenhouse gases 41 emitters 41 greenhouse gas emitter 41 polluting 40 biggest polluter 40 emission reductions 40 pollutant 40 harmful pollutants 40 gases 40 carbon sinks 40 GHG emissions 40 deforestation 40 greenhouse emissions 40 Kyoto treaty 40 carbon credits 40 Carbon dioxide 40 legally binding treaty 40 carbon emissions 39 solvents 39 HFC 39 carbon emitting 39 bio fuels 39 gases blamed 39 Deforestation 39 Kyoto protocol 39 methane 39 climate change 39 curbing greenhouse gas 38 pesticides 38 harmful gases 38 fossil fuel 38 heat trapping 38 gasses 38 polluter 38 coolants 38 detergents 38 UNFCCC 38 biofuels 38 regulating greenhouse gases 37 plasticizers 37 Fossil fuels 37 Lithium ion batteries 37 CO2 37 diesel engines 37 mercury emissions 37 carbon 37 emit greenhouse gases 37 CO2 emission 37 polyvinyl chloride PVC 37 CERs 37 organic solvents 37 pesticide DDT 37 Freon 37 biomass fuels 37 poorer nations 37 synthetic fuels