Botany - Environmental Issues Question with Solution | TestHub

Device that reduces the noise emitted by the exhaust of an internal combustion engine is called muffler.

Similarly, the process of planting many trees around populated and noisy areas for reducing noise is called as green muffler. Ashoka and Neem are the preferred trees that are planted to decrease the noise pollution in residential areas. Dense trees are known to filter out the noise and obstruct it from reaching the people. The trees act as the sound absorbers.