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sound pollution is very harmful. it is mostly found in the big cities. nobody know that how slowly it enters the human life and affect the Nervous System. loud sound of buses , scooter aeroplanes trains and trucks cause sound pollution. loud noisenof heavy machines of the factories industries and workshops is responsible for noise pollution. speakers radios and pop music television sets are the most injurious to human mind when they are tune at full volume. too much sound damages the hearing power and it may cause deafness and mental diseases.