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  1. The ‘Green House effect’ is produced due to the presence of excess amount of
    1. Sulphur dioxide
    2. Nitrogen dioxide
    3. Carbon monoxide
    4. Methane
Correct Option: D

By their percentage contribution to the greenhouse effect on Earth the four major gases are: Water vapour (36-70%), Carbon dioxide (9-26%), Methane (4-9%) and Ozone (3-7%).



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