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  • Pollution of Air and Water
  • Which of the following is a natural cause of air pollution?
Multiple choice

Which of the following is a natural cause of air pollution?

  1. Automobile exhaust

  2. Volcanoes

  3. Petroleum refining

  4. Exhaust from cement factory

  5. Exhaust from pesticide production unit

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Volcanoes are a natural cause of air pollution.

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