81.   But scientists do not know whether there is an environmental problem in the area, or a statistical anomaly.

82.   But the mine has fierce opponents, too, both in Montana and in neighboring Idaho, who say it will cause serious environmental problems.

83.   But supporters are banking on voters forgetting the missteps and controversies of her first term and focusing on her work on issues like schools and urban environmental problems.

84.   But the environmental problems are just now being addressed.

85.   But their noise and exhaust cause environmental problems.

86.   Calderon took part in a subsequent commission that found initial proof of health and environmental problems caused by repeated shelling from ships and by aerial bombardment.

87.   Cigarettes offer a reasonable solution to tough environmental problems.

88.   Companies with records of human rights abuses, environmental problems or sweatshop conditions are difficult enough to ferret out in the United States.

89.   Concerns about leaky storage tanks, asbestos-laden buildings or other environmental problems are scuttling property sales at a growing rate.

90.   Contamination from chlorine bleaching has been linked to environmental problems around the world.