31.   When chlorine combines with organic matter from the wood, it creates many compounds that pollute waste waters.

32.   Within a short time, the water was polluted.

33.   But the lake water is polluted with lead and other minerals from mining operations and is not used for drinking water.

34.   But the lake water is polluted with lead and other minerals from mining operations and is not used for the water supply.

35.   But when the water became polluted and the fish disappeared, he switched to catching snakes used for soup.

36.   Environmentalists also have complained that the enormous amounts of snow being dumped into Lake Maelaren is polluting the water.

37.   Five years ago he realized the frogs in the creek near his house were dying because the water was polluted.

38.   Giant hog farms are polluting the water and fouling the air around them, environmentalists said Wednesday as they announced a legal strategy against the industry in seven states.

39.   If left untreated, the oil might seep into underground aquifers and pollute water.

40.   I never polluted the waters.