O-LevelBiologyEcology & Environment5090/11 · May/June 2023 · Q391 Mark

Which human activity is likely to contribute most to global warming?

Anon-biodegradable plastics in the ocean

Bpollution due to insecticides

Cemissions from burning fossil fuels

Dwater pollution by sewage

✓ Correct answer

C: emissions from burning fossil fuels

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Topic: Ecology & Environment, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, May/June 2023 Paper 1 Variant 1, question 39.

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