1. ozone depletion
... ." ( ) In the 1970's scientist discovered that chemicals called chlorofluorocarbons, or CFC posed a threat to the precious ozone layer when used for extensive periods of time. CFC's have chemical and physical properties that make them valuable in industry. CFC's are and unreactive chemically. "They are non-toxic, non-corrosive, non-flammable, and very stable."( ) And for these reasons they have been ... used in fire extinguishers, as propellants in aerosols, solvents in electronics manufactured, and as foaming agents in plastics. "Notable among the physical properties of some CFC's are b...
- Word Count: 1505
- Approx Pages: 6
- Grade Level: Undergraduate