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

Explanation

The major causes of air popution in metro cities-
1. Smoke stacks of thermal power plants, smelters and other industries.
2. Burning of fossil fuels in automobiles. industries and households.
3 Smoke from forest fires, volcanic eruptions.
4. Decomposition of garbage resulting in release of unwanted gases into the atmosphere.
Three ways to reduce the air pollution are as follows :
1. Electrostatic precipitator.
2. Scrubber.
3 Catalytic Converters.