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2. We will save thousands of trees if we don't waste so much paper.
3. What would you do if air pollution got really bad?
4. Polluted water causes the death of aquatic animals such as fish and crabs.
5. If we recycled more, less rubbish went to landfill sites.
7. Too much use of electric lights in cities may cause light pollution.
8. Water pollution is one of the most serious enviromental problems of our time.
