In India, the Air (Prevention and Control of Pollution) Act came into force in ____(a)_____, but was amended in____(b)________ to include _____(c) ______.

(a) - 1981 , (b) - 1987 , (c) - Noise pollution .

The correct answer is Option (1)- (a) - 1981 , (b) - 1987 , (c) - Noise pollution .

In India, the Air (Prevention and Control of Pollution) Act came into force in 1981 but was amended in 1987 to include noise as an air pollutant. Noise is undesired high level of sound. We have got used to associating loud sounds with pleasure and entertainment not realising that noise causes psychological and physiological disorders in humans. The bigger the city, the bigger the function, the greater the noise!A brief exposure to extremely high sound level, 150 dB or more generated by take off of a jet plane or rocket, may damage ear drums thus permanently impairing hearing ability. Even chronic exposure to a relatively lower noise level of cities may permanently damage hearing abilities of humans. Noise also causes sleeplessness, increased heart beat, altered breathing pattern, thus considerably stressing humans.