Fill each gap with a given word

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Practice 1 Fill each gap with a given word
damage - pollutants - effect - untreated - exposed - dumping - contaminating
1. The poisonous chemical waste is dumped into the river.....
2. Do you know what are the most common.....of the air?
3. If parents are.....to radiation, their offsprings are likely to have birth defects.
4. The acid rain recently has caused serious.....to the crops in the region.
5. Her mother is annoyed because she is always.....her school things on the floor.
6. Visual pollution has a greater.....on people than you may think.