Question

how do CFCs cause thinking of ozone layer​

Answer 1

Chloro - Fluoro- Carbons (CFCs) are the chemical compounds made of chlorine, fluorine, and carbon elements Chlorofluorocarbons are industrially useful gases but they also behave as air pollutants because of their damaging effect on ozone layer

Answer 2

Because of their relative stability,

CFCs rise into the stratosphere where they are eventually broken down by ultraviolet (UV) rays from the Sun. This causes them to release free chlorine. The chlorine reacts with oxygen which leads to the chemical process of destroying ozone molecules

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