noun. Any of various halocarbon compounds consisting of carbon, hydrogen, chlorine, and fluorine, once used widely as aerosol propellants and refrigerants. Volatile chlorofluorocarbons are believed to cause depletion of the atmospheric ozone layer.

noun. Any of a class of organic compounds in which the hydrogen atoms of a hydrocarbon are replaced with those of chlorine and fluorine; formerly used as refrigerants and aerosol can propellants but withdrawn due to causing damage to the ozone layer.

noun. a fluorocarbon with chlorine; formerly used as a refrigerant and as a propellant in aerosol cans

"Step 1: Appliances are unloaded from collection trucks and identified by type of refrigerant; those manufactured before 1996 likely contain R-12, a chlorofluorocarbon that's now listed as an ozone-depleting substance, or ODS."

Freon  

fluorocarbon  greenhouse emission  greenhouse gas  pollutant  

Freon  HCFC  hydrochlorofluorocarbon