Multiple choice

Which of the following is not a greenhouse gas?

  1. Nitrogen

  2. Carbon dioxide

  3. Sulphur dioxide

  4. Ethane
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Nitrogen (N2) is not a greenhouse gas because its molecular structure is symmetrical and non-polar, so it does not absorb infrared radiation. The other options - carbon dioxide, sulphur dioxide, and ethane - all have molecular structures that trap heat in the atmosphere, contributing to the greenhouse effect.

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