lionking06
春芽
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Noise Pullation
The present world,because of technological development,all of the things that are innovative,but it is behind it,but it has a negative impact.
Motor vehicles are the tools we use to travel,but the car exhaust is polluting the environment,as well as vehicle noise,is a kind of pollution,according to scientists calculated that a car the noise is 20 decibels,but a group of cars the noise can be a building,shattered glass,but people never pay attention the negative impact of noise are for convenience only.
Now scientists have developed a slight noise,cars,which greatly reduces noise pollution!
1年前
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