define water pollution
Answers
➤ Water pollution is defined as a biological, chemical and physical change in the water that can cause a harmful effect on any living organism.
➤ Water pollution is usually a result of human activities.
➤ Water pollution can make water unsuitable for the use of living organism.
➤ Waste remains released in water from factories and industries.
➤ Wastes from cities and towns.
➤ Fertilizers or chemicals that run off from the field.
➤ Hot water released from factories to the water.
➤ Diseases like jaundice, cholera, typhoid can be spread through water pollution.
➤ BOD get decreased.
(BOD- Biological Oxygen Demand, it is the amount of dissolved oxygen needed by aerobic biological organism to break down organic material present in water.)
➤ Dirty water may lead to change in aquatic temperature.
➤ It can also kills the aquatic organism.