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O-LevelBiologyEcology & Environment5090/11 · Oct/Nov 2018 · Q321 Mark

In recent years, important rivers in many parts of the world have become more acidic. What has caused this change?

Aair pollution by sulfur dioxide

Bdeforestation

Cincreased use of insecticides

Dincreased use of nitrate fertilisers

✓ Correct answer

A: air pollution by sulfur dioxide

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About this question

Topic: Ecology & Environment, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, Oct/Nov 2018 Paper 1 Variant 1, question 32.

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