Ozone-layer is getting depleted because of

Excessive use of automobiles

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Excessive formation of industrial units

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Excessive use of man-made compounds containing both fluorine and chlorine

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Excessive deforestation.

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Solution

The correct option is C Excessive use of man-made compounds containing both fluorine and chlorine

(c) excessive use of man-made compounds containing both fluorine and chlorine

Reduction in the concentration of ozone layer is called ozone depletion. It is caused by certain chemicals which are generally rich in chlorine, fluorine and carbon and are called Ozone Depleting Substances (ODS).

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