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  4. The major ozone depleting substance out of the following is

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Q. The major ozone depleting substance out of the following is

Environmental Issues

Solution:

Ozone depleting substances $(ODS)$ are substances which react with ozone present in the stratosphere and destroy the same. The major $ODS$ are chlorofluorocarbons ($14\%$ of total depletion), nitrogen oxides ($3.5\%$ depletion), sulphur dioxide, halon, carbon tetrachloride, methyl chloroform, chlorine, etc.