Discussion
Green muffler is used against which type of pollution ?
Answer: B
A green muffler is used against noise pollution.
A green muffler is a belt of dense trees and shrubs planted along roads and highways, especially near homes, schools and hospitals. The foliage absorbs and scatters sound, reducing the traffic noise that reaches nearby buildings, just as a muffler quietens an engine.
Trees do also trap dust and absorb some gases, which makes 'Air' the usual trap, but the term 'green muffler' is used specifically for noise control. It has no special role against soil or water pollution.
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