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The gas predominantly responsible for global warming is

  • A.Carbon dioxide
  • B.Carbon monoxide
  • C.Nitrous oxide
  • D.Nitrogen peroxide

Answer: A

Carbon dioxide is the gas chiefly responsible for global warming. It is not the most powerful greenhouse gas per molecule, but it is released in by far the greatest quantity and persists in the atmosphere for centuries.

Carbon monoxide and nitrogen peroxide are pollutants rather than significant greenhouse gases; nitrous oxide is a greenhouse gas but is present in far smaller amounts.

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