Paper 1 · People, Development and Environment
Which of the following statements are true in the context of methane? 1. Methane is a hydrocarbon that is a primary gas as well as a greenhouse gas. 2. Methane is emitted from a variety of anthropogenic and natural sources. 3. Methane is 25 times less potent than carbon dioxide at trapping heat in the atmosphere.
- Methane is a hydrocarbon that is a primary gas as well as a greenhouse gas
- Methane is emitted from a variety of anthropogenic and natural sources
- Methane is 25 times less potent than carbon dioxide at trapping heat
A1 and 2 ✓ Correct
B1 and 3
C1, 2 and 3
D2 and 3
Correct answer: (A) 1 and 2 — Statements 1 and 2 are true, so that is the answer.
Explanation
★Statements 1 and 2 are true, so that is the answer.
★Methane is a hydrocarbon that is both a primary gas and a greenhouse gas.
★It is emitted from many anthropogenic and natural sources.
★Statement three is false, because methane is more potent than carbon dioxide, not less.
★So only statements 1 and 2 are true.
★So the answer is 1 and 2.
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