Mention the major cause of air pollution in metro cities. Write any three ways by which it
can be reduced.
The major cause of air pollution in metro cities is vehicular pollution and industrial
Three ways by which the pollution can be reduced are:
- use of catalytic converters in vehicles.
- use of CNG as an alternative to petrol/ diesel.
- use of lead-free petrol/ diesel.
- application of Euro III norms for vehicles.