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´óÆÆ»µ) on the environment. Nitrates are swept away by surface runoff to lakes and seas. Too many nitrates “overª²enrich” these bodies of water, encouraging the buildup of algae, or microscopic plants that live on the surface of the water. Algae deprive the water of oxygen that fish need to survive, at times choking off life in an entire body of water.

WHAT’S  THE  SOLUTION?

Water expert Gleick advocates conservation and local solutions to water--related problems; governments, for instance, would be better off building small--scale dams rather than huge and disruptive projects like the one that ruined the Aral Sea.

“More than 1 billion people worldwide don’t have access to basic clean drinking water,” says Gleick. “There has to be a strong push on the part of everyone—governments and ordinary people—to make sure we have a resource so fundamental to life.”

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1. That the huge water projects have diverted the rivers causes the Aral Sea to shrink.

2. The construction of massive dams and irrigation projects does more good than harm.

3. The chief causes of water shortage are population growth and water pollution.

4. The problems Americans face concerning water are ground water shrinkage and tap water pollution.

5. According to the passage all water pollutants come from household waste.

6. The people living in the United States will not be faced with water shortages.

7. Water expert Gleick has come up with the best solution to water—related problems.

8. According to Peter H. Gleick, by the year 2025, as many as       of the world’s people will suffer from water shortages.