Question

Definition of air pollution

Answer 1

the presence in or introduction into the air of a substance which has harmful or poisonous effects.

( brief definition :- )

Air pollution occurs when the air contains gases, dust, fumes or odour in harmful amounts. That is, amounts which could be harmful to the health or comfort of humans and animals or which could cause damage to plants and materials.The substances that cause air pollution are called pollutants. Pollutants that are pumped into our atmosphere and directly pollute the air are called primary pollutants. Primary pollutant examples include carbon monoxide from car exhausts and sulfur dioxide from the combustion of coal.Further pollution can arise if primary pollutants in the atmosphere undergo chemical reactions. The resulting compounds are called secondary pollutants. Photochemical smog is an example of this.

Answer 2

The contamination of air by pollutants like dust,smoke and harmful gases which cause adverse effects on human beings,plants,animals and the environment is known as air pollution.