Abaut Water pollution

Definition ;- Pollution is the introduction of contaminants into an environment that causes instability, disorder, harm or discomfort to the ecosystem i.e. physical systems or living organisms .[ Pollution can take the form of chemical substances, or energy, such as noise, heat, or light. Pollutants, the elements of pollution, can be foreign substances or energies, or naturally occurring; when naturally occurring, they are considered contaminants when they exceed natural levels. Pollution is often classed as point source or non point source pollution. The Blacksmith Institute issues annually a list of the world's worst polluted places.

Water pollution refers to the addition of foreign substances (pollutants) to a water source. These impurities have a detrimental effect on water quality, and can be harmful to living organisms and aquatic life. Pollution can be introduced to water from both point sources and diffuse sources. Common sources of pollutants include man-made industrial waste and domestic sewage, and natural sources such as soil erosion and silt-bearing run-off.