What are chlorofluorocarbons and what impact do they have on the atmosphere?

Chlorofluorocarbons are abbreviated as CFC. It contains only carbon, fluorine, and chlorine. Initially, CFC is used as refrigerants.

Impact of chlorofluorocarbons on the atmosphere are:

(1) It damages the earth's ozone layer. So, it was banned in 1996.

(2) It also contributes to global warming.

(3) They have lived in atmosphere of about 20 to 100 years.