Forests are called green lungs because they maintain the balance of oxygen and carbon dioxide in the atmosphere.
Lead is the most hazardous metal pollutant of automobile exhaust.
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Updated on : 2022-09-05
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Photochemical smog is a noxious smog produced by the photochemical oxidation of nitrogen oxides with hydrocarbons in the presence of ultraviolet light from the sun. One of the products of the reaction is ozone, thus, the photochemical smog always contains ozone (O3).
Forests are called green lungs because it consists of trees which have green leaves. The leaves take in carbon dioxide and give out oxygen. thus they purify the air.
Lead may be present in exhaust fumes emitted into the atmosphere by automobiles which pollute the environment.