CBSE Class 12-science Answered
The major causes of air pollution in metro cities are
(i) Smoke from forest fires, volcanic eruptions etc.
(ii) Decomposition of garbage resulting in the release of unwanted gases into the atmosphere.
(iii) Burning of fossil fuels in automobiles and industries release particulate air pollutants.
(iv) Use of unleaded petrol.
(v) Gaseous waste or particulate by-products of various industries.
Control measures of air pollution:
(i) Use of electrostatic precipitators to remove particulate matter from industries and thermal power plants.
(ii) Use of scrubber to remove gases like S02.
(iii) Use of catalytic converters in automobiles to reduce the emission of poisonous gases.