what is pollution ?

'Pollution' means - "The introduction of wastes into the environment which has harmful or poisonous effects". There are many types of pollutions. They are:- 1) Land pollution. 2) Sound pollution. 3) Water pollution. 4) Air pollution.

there are 4 types of pollution there are Land pollution ,Water pollution , Noise pollution, Air pollution

Pollution is undesirable change that pollute the environment. Pollution is of four types . 1.Air 2.Water. 3.Soil /Land. 4.Noise pollution.