If my home installed a solar water heater, we would save a lot of energy.
Noise pollution is any loud sounds that are either harmful or annoying to humans and animals.
Generallly, noise is produced by household appliances, big trucks, vehicle and motorbikes on the road, planes, helicopters flying over cities,load speakers,ect ...
4.If people rode their bikes, they would keep the air less polluted.
5.If that factory had wastewater treatments, the river would not become so polluted.