Related by context. Frequent words. (Click for all words.) 57 CFCs 55 fluorocarbons 54 chlorofluorocarbons 54 HFC #a 54 chlorofluorocarbons CFCs 53 ozone depleting 52 refrigerants 51 Earth ozone layer 51 ozone layer 51 Methyl bromide 50 ozone depleting chemicals 50 coolants 49 stratospheric ozone layer 49 ozone depleting substances 49 R#a 48 HCFC 48 stratospheric ozone 48 HCFCs 47 Refrigerant 47 Volatile organic compounds 47 respiratory irritant 47 Freon 47 freon 46 Nitrogen oxides 46 SF6 46 Ultraviolet light 46 ozone depletion 46 potent greenhouse gas 45 protective ozone layer 45 hydrofluorocarbons 45 absorbs carbon dioxide 45 sulfur hexafluoride 45 Ozone layer 45 paints adhesives 44 halogenated 44 Washing machines 44 stainless tubular steel 44 Particulates 44 sulphates 44 pentane 43 oxidise 43 gases 43 upper troposphere 43 Burning fossil fuels 43 Gaseous 43 noble gases 43 deodorizers 43 ionizing 43 methane CH4 43 dehumidifying 42 Trichloroethylene 42 naturally occurring mineral 42 Kyoto protocol 42 protein mimetics 42 gases emitted 42 harmful ultraviolet radiation 42 refrigerant 42 urea injection 42 degreasers 42 gasses 42 methylene chloride 42 PCBs polychlorinated biphenyls 42 carbon tetrachloride 42 carbon dioxide methane nitrous 42 organic solvents 42 Compact fluorescent light 42 isoprene 42 air conditioners refrigerators 41 Kyoto Treaty 41 acidifying 41 sulfur dioxide SO2 41 particulate filters 41 ultra violet radiation 41 Inappropriate posts may 41 Carbon dioxide 41 Air Conditioning HVAC 41 Compact fluorescent bulbs 41 suspected carcinogen 41 hydraulic fluids 41 absorbents 41 oxidizing agent 41 Ultraviolet radiation 41 Montreal Protocol 41 drain cleaners 41 Aerosols 41 corrosives 41 petroleum distillates 41 icecaps 41 oxidizers 41 harmless nitrogen 41 hydroxyl radicals 41 ultra violet rays 41 unvented 41 ozone 40 ionised 40 Carbon Dioxide 40 Kyoto Protocols 40 cleaning solvents 40 aerosol sprays 40 elemental sulfur 40 HFCs