Air pollution is poouted air. Air pollution is a serious problem worldwide. Cars, trucks on the street can make air dirty. So can factories. We plant many trees to clean the air. Because trees are clean the air.
Water pollution is rivers and sea become dirty. The river and the sea is polluted by the sewage of the city. The water become dirty not only people but also animals and plants are become victims. We must not throw garbage into the sea anymore. We don't have to a cleaner to clean the water. It help that factories use purgation system, too.
Ground pollution happen garbage that we throw away. Garbage which are not separated can pollute the ground. It help that we pick up the garbage in mountain. It help that we separate garbage in house.
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