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Question

Mention the major cause of air pollution in metro cities. Write any three ways by which it can be reduced.

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Solution

Automobile emissions are a major cause of air pollution in metro cities. Their added increase in number has worsened the situation.
Ways to control this include:-
  • Use of unleaded petrol and low-sulfur or sulfur-free
  • Use of catalytic converters to reduce the emission of poisonous gases
  • Application of stringent pollution-level norms for vehicles such as Bharat Stage III and Bharat Stage IV that specify mass emission standards for the vehicles.


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