Question

Define what is water pollution explain the reasons behind water pollution

Answer 1

Water Pollution➬ Any  chemical, physical or biological change in the quality of water that has a harmful effect on environment.

✴Causes of water Pollution are:-

[1] Industrial waste
[2] Waste of households
[3] Factories are discharged into lakes and rivers

Answer 2

water pollution refers to the blend of such substances in the river,lakes,ponds,underground and sea water that invalidates water for the use by human.
reasons behind water pollution-
1.industrial waste and its inadequate disposals.
2.acid rain 
3.the oil spills from oil tankers
4.inadequate sewage water treatment.

hope it helps u ...