Describe common air pollutants and their main sources.

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Solution

Air pollution is the introduction of excessive amounts of chemicals in air which are harmful to the plants, animals and surroundings. Common air pollutants and their sources are found below:

Sl.No. Air pollutant Sources

1. Particulate matter (tiny particles suspended in air) Forest fires, dust storms, burning of fossil fuels and dust storms

2. Carbon dioxide and carbon monoxide Burning of carbon rich fuels such as firewood coal and petroleum

3. Oxides of Sulphur and Nitrogen Burning of fossil fuels such as coal and petroleum in automobiles and thermal power plants

4. Chlorofluorocarbons Aerosol sprays, paints, thrown away metallic cans, Plastic foams, coolants and cleaning solvents

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Sl.No.	Air pollutant	Sources
1.	Particulate matter (tiny particles suspended in air)	Forest fires, dust storms, burning of fossil fuels and dust storms
2.	Carbon dioxide and carbon monoxide	Burning of carbon rich fuels such as firewood coal and petroleum
3.	Oxides of Sulphur and Nitrogen	Burning of fossil fuels such as coal and petroleum in automobiles and thermal power plants
4.	Chlorofluorocarbons	Aerosol sprays, paints, thrown away metallic cans, Plastic foams, coolants and cleaning solvents