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

[prasanna]

The major causes of air pollution in metro cities are :

1. Smokestacks of thermal power plants, smelters and other industries.
2. Burning 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.