The Total solution for NCERT class 6-12
Pollution
Pollutant
(i) Pollution is the addition of unwanted, harmful substances in the atmosphere in substantial amount over a considerable period of time.
(i) Pollutants are the substances which are unwanted, and harmful. They make the environment polluted.
(ii) It is the degradation of the quality of environment.
(ii) They degrade the quality of the environment.
(iii)Pollution is caused by pollutants.
(iii) Addition of pollutants is the cause of pollution.