41.   Originally, Drenner intended to set up the experiment at the Fort Worth Zoo to see if the system could clean up polluted water in the primate area.

42.   Other researchers found male fish in polluted waters behaving physiologically like females.

43.   Others, like Chicago, built huge underground storage tunnels that hold excess wastewater until dry weather returns and the polluted water can be pumped to sewage treatment plants.

44.   Oysters taken from the leased beds are transplanted from polluted waters and allowed to purge themselves of impurities for several weeks before being harvested.

45.   Polluted coastal waters are killing sea otters.

46.   Pathogens contained in polluted water can result in a range of illnesses, from gastroenteritis and dysentery to hepatitis and ear and upper respiratory infections.

47.   Perhaps unfairly, middle-class Beijingers tend to regard Beidaihe as a place with crowded beaches, polluted water and seafood that is unsafe for eating.

48.   Proponents note that wetlands, besides their biological richness and power to cleanse polluted waters, are surprisingly cheap and quick to recreate.

49.   Purists advise eating raw produce only when you can peel it because it may have been washed in polluted water.

50.   Swimming in polluted water is liable to cause an infection.