"cfc free" is a term which refers to the disuse of a particular chemical compound called chloroflorocarbons. This chemical was commonlly used in many house hold items such as airconditioners, refridgerators, and other freon based items as well as a propelant in aresol cans until it was discovered in the 60's and 70's that cfc's would make their way into the atmosphere and eat away at the ozone layer for years on end.
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