A Green Muffler is a method to control noise pollution.
'Green Muffler' is related to – (1) Soil pollution (2) Air pollution (3) Noise pollution (4) Water pollution
Asked in Sub Inspector Comb. Comp. Exam 2021 b 2021 · Topic: Pollution (Noise Pollution: Sources, impacts on health & wildlife, permissible limits, mitigation.)
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