Assertion (A): Chlorofluorocarbons are respon | vedclass

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(C) The stratosphere of the Earth's atmosphere contains an ozone layer that protects us from harmful ultraviolet $(UV)$ radiations from the sun.Chloro

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If the Assertion is correct but Reason is incorrect.

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(C) The stratosphere of the Earth's atmosphere contains an ozone layer that protects us from harmful ultraviolet $(UV)$ radiations from the sun.Chlorofluorocarbons $(CFCs)$,which contain chlorine,are used as coolants in air conditioners and refrigerators and are the primary chemicals responsible for ozone depletion.After being released into the troposphere,$CFCs$ migrate to the stratosphere,where they are broken down by $UV$ radiation,releasing chlorine atoms.In the presence of sunlight,these chlorine atoms break down $O_3$ into $O_2$.While the Assertion is correct,the statement that the ozone level decreases by $67\%$ every year is factually incorrect,as the depletion rate is not a fixed annual percentage of $67\%$ globally.Therefore,the Assertion is correct,but the Reason is incorrect.

Assertion $(A)$: Chlorofluorocarbons are responsible for ozone depletion.
Reason $(R)$: Ozone level decreases by as much as $67\%$ every year.

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Assertion $(A)$: Chlorofluorocarbons are responsible for ozone depletion.Reason $(R)$: Ozone level decreases by as much as $67\%$ every year.