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  1. Supersonic jet causes pollution by thinning of

    2. A.

     O3 layer
    B.

     O4 layer
    C.

     SO2 layer
    D.

     CO2 layer

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    Answer : Option A

    Explanation :

    Most commercial flights are confined to the troposphere, but high-level supersonic aircraft inject pollutants into the stratosphere, which leads to the thinning of the ozone layer. Of these nitrogen oxides are especially harmful.

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