Paper 1 · People, Development and Environment
Which of the following statements are true? 1. Carbon dioxide and methane are similar in terms of their per-molecule contribution to global warming. 2. Burning fossil fuels at high temperatures is the main source of nitrogen oxides, sulphur oxides and carbon oxides. 3. Petrol is mainly responsible for the release of lead into the environment.
- Carbon dioxide and methane are similar in per-molecule contribution to global warming
- Burning fossil fuels at high temperatures is the main source of nitrogen, sulphur and carbon oxides
- Petrol is mainly responsible for the release of lead into the environment
A1 and 2
B2 and 3
C1 and 3
D1, 2 and 3 ✓ Correct
Correct answer: (D) 1, 2 and 3 — All three statements are true, so that is the answer.
Explanation
★All three statements are true, so that is the answer.
★The book treats carbon dioxide and methane as comparable in their warming role here.
★Burning fossil fuels at high temperatures is the main source of these oxide pollutants.
★Leaded petrol is the main way lead is released into the environment.
★So each of the three statements is true.
★So the answer is 1, 2 and 3.
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