ABSTRACT
Noise pollution is the extreme noise that may harm the activity or balance of human beings or wildlife. The source of noise worldwide is mainly from industrial machines, transportation systems and indoor noise generated by machines, building activities, domestic appliances, music performances and so forth. Noise may not be high enough to damage hearing, but the same has an adverse effect on human health. Transportation contributes largely to environmental noise. So vegetation has been proposed as a natural material to reduce noise energy outdoors. Belts of trees and bushes situated between the noise source and the receiver can reduce the noise level perceived by the receiver.
