Which of the following are sources of noise pollution?
A
Crackers
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B
Silencers
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C
Heavy machines
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D
Loud speakers
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Solution
The correct options are A Crackers C Heavy machines D Loud speakers Noise is unwanted sound which is unpleasant to ears. Following are some of the sources of noise pollution:
Loud speakers
Crackers
Traffic
Heavy machines
Silencers are devices used to control noise pollution by reducing sound intensity.