Question

Write a note on sources of air pollution.

Answer 1

The major causes and sources of air pollution are discussed below:

1. The major source of air pollution in big cities and industrially advanced countries is automobiles (cars, motor vehicles).
2. The burning of coal or other fossil fuels releases a considerable amount of sulfur dioxides into the air. During rain, sulfur dioxide in combination with water form sulfuric acid which corrodes monuments, green plants, etc. The rain is termed acid rain.
3. Bituminous coal used as cooking fuel, charcoal, and firewood also cause air pollution by producing carbon dioxide, carbon monoxides, and sulfur dioxides. These gases create a layer over the earth which allows penetration of the sunlight on the earth but hinders radiation from the earth's surface and increases heat on the earth's surface (Green House Effect).
4. Certain air pollutants e.g. pollen, spores or cells of fungi and lower plants, volcanic gases, and marsh gas are produced naturally.
5. Agricultural activities such as crop spraying and dusting for pest and weed control are responsible for emitting organic phosphates, arsenic, and lead into the air which causes air pollution.