Question

Differentiate between a point source and a non-point source of water pollution, why do you think non-point sources of pollution are difficult to control?

Answer 1

Point source of water pollution	Non-point source of water pollution
The waste from sources such as factories and sewage treatment plants enters a water body at a specific place. Such sources of water pollution are called point sources of water pollution.	When the point for entry of pollutants in the water body cannot be specified, it is termed as non-point sources of water pollution. They include surface run-off, mining wastes, construction wastes, municipal wastes and acid rain.

Non-point sources of pollution are difficult to control because the pollutants enter water bodies at various points and at different places.