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Question

Which of the following is not a source of air pollution in cities? 
  1. Vehicle
  2. Burning of garbage
  3. Industries
  4. Cycle


Solution

The correct option is D Cycle
Emission of harmful gases from vehicles, industries and from the burning of waste is the main cause of air pollution in cities. Cycling is the best way to reduce air pollution as it does not use any fuels like petrol and diesel.

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