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Answer: 4. sulphur dioxide

Greenhouse gases absorb infrared radiation re-emitted by the Earth. \(\mathrm{N_2O}\), \(\mathrm{CH_4}\) and \(\mathrm{O_3}\) (and \(\mathrm{CO_2}\), CFCs) all do. \(\mathrm{SO_2}\) is an acid-rain gas and a pollutant, but it is not counted as a greenhouse gas. Answer: option (4).

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report
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