Question

________ is an addition of any constituents to air, water or soil, which adversely alters the natural quality of the environment.

Answer 1

Pollution is an addition of any constituents to air, water or soil, which adversely alters the natural quality of the environment. The constituent thus added is called a pollutant. The pollutants in the environment can be dispersed, broken down, stored or recycled naturally. As the result, it becomes dangerous to the lives of organisms in the environment. For example, if we pour a glass of hot water in a river, it would hardly affect the quality of water and the life living in it, but if we continuously drain hot water from a factory into the river, the river water get warmed to an extent that it would disturb the river organisms and may affect aquatic life. In this example, heat is a pollutant.