Moderate

In big cities, air pollution is mainly due to:

Correct answer: A. Burning of fossil fuel

  • A. Burning of fossil fuel
  • B. Thermal power plants
  • C. Sewage
  • D. Suspended particles

Explanation

In large cities, fossil-fuel combustion in vehicles, industries and heating systems is a major source of air pollution, releasing gases and particulates. Thermal power plants contribute, but they are one component of the broader fossil-fuel source.

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