O-LevelChemistryChemistry of the Environment5070/11 · Oct/Nov 2020 · Q321 Mark
Carbon dioxide, methane and oxygen are gases involved in the carbon cycle. Which of these gases may contribute to global warming?
Acarbon dioxide only
Bcarbon dioxide and methane
Ccarbon dioxide and oxygen
Dmethane only
✓ Correct answer
B: carbon dioxide and methane
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