51.   Also, they have reduced their level of cheating in recent weeks.

52.   Bush was criticized for scrapping proposals to reduce the level of carbon dioxide emissions from power plants and for bowing out of the Kyoto Treaty to combat global warming.

53.   But cholesterol-lowering studies were disappointing, in part, researchers said, was because reducing cholesterol levels was very difficult.

54.   But however hardy wild plants turn out to be, the researchers stress the importance of continuing to reduce pollution levels.

55.   But Glenn Gibson, a food microbiologist at Reading University, is concerned that reducing the level of oligosaccharides in the food may have undesirable effects.

56.   But marination does nothing to reduce the level of other carcinogens that arise when fat falls on a fire and causes smoke.

57.   But some environmentalists say that reducing the level of environmental regulation, either through the Superfund law or state rules, would be a mistake.

58.   But the new ideas can reduce the level of risk.

59.   But the global military threat to the United States has clearly diminished, making it sensible to reduce force levels, guardsmen included.

60.   But while dialysis removes most waste products from the blood, it cannot reduce high levels of phosphorus.