waste matter that contaminates the water or air or soil

a halocarbon in which some hydrogen atoms have been replaced by fluorine; used in refrigerators and aerosols

a gas that contributes to the greenhouse effect by absorbing infrared radiation

a fluorocarbon that is replacing chlorofluorocarbon as a refrigerant and propellant in aerosol cans; considered to be somewhat less destructive to the atmosphere

any one or more chlorofluorocarbons (or related compounds) that are used as an aerosol propellant, organic solvent, or refrigerant