CFC's (Chlorofluorocarbons)

Chemical compounds containing mixtures of carbon, chlorine and fluorine molecules. Because of their stability, lack of flammability and ability to absorb and give up heat readily, CFC's have in the past been popular refrigerants. However, CFC's have been found to contribute to the deterioration of the ozone layer of the upper atmosphere, which is a condition believed to be hazardous to global health. These compounds should not be released into the atmosphere, but should be carefully collected for recycling. Production of CFC's is being phased out by an international convention, the Montreal Protocol.