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5th Class Science Sample Paper Science Olympiad Model Test Paper-4

  • question_answer
    Air contains very less amount of carbon dioxide as compare to nitrogen and oxygen. What is the effect of increased concentration of carbon dioxide in the earth's atmosphere?

    A) Global warming

    B) Melting of glaciers

    C) Air pollution

    D) All of these

    E) None of these

    Correct Answer: D

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