Define pollution . " Industries are pouring poison in water" - Expalin.

Explanation

1. Definition of Pollution:
Substances produced by the activity of mankind in concentration sufficient to cause harmful effect to his health, vegetables, property or to interfere with the enjoyment of his property is called pollutio,n.
2. "Industries are pouring poison in water". Explanation:
(1) If industries do not follow permissible limits of pollutants which are released out of their plants, they can cause lot of damage.
(2) Many kinds of pollutants are very dangerous for human life and also for all other living organisms.
(3) Heavy metals such as mercury, lead, cadmium, arsenic, selenium, etc. can cause severe effects on the human health. They can cause serious disorders of vital organs and systems.
(4) Pollutants flowing out of fertilizers and pesticide industries can cause several lethal and sublethal effects.
(5) The known hazards of Minamata or Itai itai diseases have shaken Japan due to ill effects of mercury and cadmium poisoning respectively.
(6) Therefore, strict controlling measures and abatement of these industrial pollutants are observed at many places. In spite of this, most of the rivers of India are heavily polluted.