Explain natural and human-made sources of air pollution.

Natural sources of air pollution are-

● Forest fires produce trace gases and smoke.

● Bacteria spores, pollens are natural pollutants of air.

● Volcanic eruptions releases gases and ash.

● Marsh gases are released by decay of organic matter in marshy places.

Man-made sources of air pollution are-

● Industrialisation releases toxic gases into the atmosphere through exhaust pipes.

● Vehicles that run on fossil fuels like petrol also release toxic compounds like that of lead and contribute to air pollution.

● Nuclear explosions.

● Deforestation leads to an increase in concentration of carbon dioxide in the atmosphere.