Multiple choice

Which of the following gases does not cause green house effect?

  1. Methane

  2. Nitrous oxide

  3. Sulphur trioxide

  4. Carbon dioxide
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Sulphur trioxide (SO3) is not a greenhouse gas. It rapidly forms sulfate aerosols in the atmosphere which actually scatter solar radiation and contribute to cooling, not warming. Methane, nitrous oxide, and carbon dioxide are all well-established greenhouse gases with significant radiative forcing effects.

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