Noise pollution are around us. Here are some ways to prevent them:
1) Tone down the volume of [TV, radio, speakers].
2) Avoid shouting or screaming.
3) The barking of dogs causes noise pollution,too. We should train them or entertain them to keep them from making noise.
4) Plant some trees and keep the nature clean. They help in sound reduction by absorbing it.
And of course, there are many more ways to prevent them :)
Anyways, hope it helps :D