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

Explanation :

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.

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