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  1. The highest volume of gases in lower atmosphere is comprised of

    2. A.

     Hydrogen
    B.

     Carbon dioxide
    C.

     Oxygen
    D.

     Nitrogen

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    Answer : Option D

    Explanation :

    There are a number of atmospheric gases which make up air. In the lower atmosphere or troposphere, the main gases are nitrogen and oxygen, which make up 78% and 21% of the volume of air respectively. The remaining 1% of the atmospheric gases is made up of trace gases.

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