What do you understand by air pollutant? What are the chief constituents of air impurities?
Air pollutant is a gas or an aerosol produced by human activities whose concentration threatens living organisms or the environment. The chief constituents of air impurities are:
i. Oxides of carbon, nitrogen and sulphur.
ii. Heavy metals like nickel lead cadmium, arsenic, etc.
iii. Fluoride compounds.
iv. Particulate matters like dust, grit, fly ash, etc.
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