Explain the role of the sun in the formation of soil. Justify "Dust is a pollutant."

Explanation

The sun heats up rocks during the day so the they expand. At night, these rocks cool down and contract. Since all parts of the rocks do not expand and contract the same rate, this results in the formation of cracks and ultimately the huge rocks break up into smaller pieces and forms soil.
Dust is a pollutant because it is composed of find particles, of sand, cement, asbestos, coal and other industrial harmful particles. When these particles are inhaled, various resparatory diseases are caused. .Not only this, presence dust in the air reduces visibility and Sometimes leads to road accidents.