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  1. The depletion in Ozone layer is caused by ________ .

    2. A.

     Nitrous oxide
    B.

     Carbon dioxide
    C.

     Chlorofluorocarbons
    D.

     Methane

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    Answer : Option C

    Explanation :

    Ozone depletion occurs when chlorofluorocarbons (CFCs) and halons—gases formerly found in aerosol spray cans and refrigerants—are released into the atmosphere.

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