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JAMB Biology 1991 Question 48

Question 48

Pollution

Sources of air pollutants are

  1. A.industrial chimneys, burning fossil oils and river dams
  2. B.sulphur dioxide, acid rain and pesticides
  3. C.sulphur mines, vehicle exhausts and aerosols
  4. D.sewage, smoke and old vehicles
Show the answer and explanation

Answer: C (sulphur mines, vehicle exhausts and aerosols)

Explanation

All three in C release harmful gases or particles into the air; river dams and sewage are not air-pollution sources, and B lists pollutants, not sources.