Multiple choice

The greenhouse gas is

  1. carbon dioxide

  2. sulphur dioxide

  3. nitric oxide

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

Carbon dioxide is a primary greenhouse gas that traps heat in the atmosphere. Sulphur dioxide and nitric oxide are primarily associated with acid rain and smog, while ethane is a hydrocarbon fuel.

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