Which of the following is not a greenhouse gas?

  • A.Carbon dioxide (CO₂)
  • B.Methane (CH₄)
  • C.Nitrous oxide (N₂O)
  • D.Nitrogen (N₂)

Detailed Solution:

Correct Answer: Nitrogen (N₂)

Greenhouse gases must absorb and emit infrared radiation. CO₂, CH₄, and N₂O do this effectively, but Nitrogen (N₂), despite being abundant in the atmosphere, does not trap heat and therefore is not a greenhouse gas.

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