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Chemistry · Oct / Nov 2025 · Paper 11 · Question 29

5070Air quality and climate

Carbon dioxide, methane and oxygen are gases involved in the carbon cycle. Which of these gases cause global warming?

  1. Acarbon dioxide only
  2. Bcarbon dioxide and methane
  3. Ccarbon dioxide and oxygen
  4. Dmethane only

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Correct answer: B. carbon dioxide and methane

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