Green muffler is used against which type of pollution [AIIMS 2002]
A) Air
B) Water
C) Soil
D) Noise
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Correct answer: D). Noise
The Green Muffler is a technique, which is adopted to reduce the noise pollution by planting four to six rows of green tree near the populated areas or along the road side, industrial areas etc. These trees filter out the noise and reduces noise pollution by obstructing it to reach the people.
Under this scheme highly dense tree like Ashoka and Neem tree are planted in the localities so that they can absorb the sound of high frequencies, which can cause the noise pollution.
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Noise
Explanation:
They are also helpful in absorption of pollutant gases and micro particle of soil
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