Air Pollution: Introduction and Importance

The presence of any air pollutant in the atmosphere

Any gaseous substance (including noise) present in the atmosphere in such concentrations that may be injurious to human beings or other living creatures (correct)

Substances present in the atmosphere in concentrations great enough to interfere with safety or health

Any changes in the normal composition of air that may affect living systems adversely

Industries, power plants, smelters, mines, and refineries (correct)

Residential heating systems and cooking emissions

Agricultural activities and waste disposal sites

Vehicular traffic and construction sites

To maintain normal composition of air for living systems (correct)

To prevent interference with safety or health due to air pollution

To ensure full use or enjoyment of life without discomfort

To avoid inhaling harmful substances present in polluted air

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