CFC-11 and HCFC-22 cause warming and release ozone-destroying chlorine in the stratosphere. N₂O also warms and can generate NO involved in catalytic ozone destruction, although its classification differs from the listed Montreal-controlled chlorine substances. CO₂ is a greenhouse gas but not the intended ozone-depleter. The official MSQ key accepts **{A, C} OR {A, C, D}**,and both complete answer sets are preserved.
More Global Effects of Air Pollution questions
GATE 2026 ES Q32– Which statements about global warming are correct? Select all that apply.
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GATE 2024 ES Q21– Which is NOT a greenhouse gas in the conventional environmental classification?