Question

Information about Water pollution

Answer 1

it occurs when there is addition of unwanted substance in water these affect not only is but also our environment. people and other organisms r affected to a great extend. the main reason for this is the discharge of sewage from various sources.

Answer 2

contamination of water bodies is called water pollution.
The causes of water pollution are Sewage and Wastewater, Marine Dumping ,Industrial Waste
  etc.