. How can water and noise pollution be prevented? State two measures each.
Following are the measures to reduce water pollution:
(i) The industrial effluents must be treated chemically before dumping it into the water bodies.
(ii) Sewage can be treated in water purification plants and can be converted to pure drinking water by biological treatment.
Following are the measures to reduce noise pollution:
(i)The industries must be set away from the residential areas.
(ii) As trees are good absorbers of the sound, afforestation must be encouraged.
(iii)Usage of loud speakers, mics and horns at public places must be discouraged.