Describe various causes of water pollution.

Explanation

Causes of water pollution are :
1. Agricultural water pollution : It includes sediments , fertilizers and farm animal wastes.
2. Shipping water pollution : It includes both human sewage and other wastes. Oil is most important pollutant. Most of chemicals of industrial wastes have been toxic to humans as well as animals and may bring about death or sub-lethal pathology of liver, kidneys reproductive or nervous systems.