Fill in each gap with only one suitable word. Environmental pollution is a term that refers to all the ways by which man (1) _____ his surroundings. Man dirties the air with gases and smoke, (2)_____ the water with chemicals and other substances, and damages the soil with (3) _____ many fertilizers and pesticides. Man also pollutes his (4) _____ in other ways. For example, people ruin natural beauty by disposing garbage and waste products on the land and in the water. They operate machines and motor vehicles that fill the air with disturbing (5) _____ and smoke.

Environmental pollution is a term that refers to all the ways by which man (1) _____ his surrounding