41.   At the same time, the study says, on-line communities are highly fragmented.

42.   Be careful, study says.

43.   Because of those social costs, the state might even have lost money in the long run, the study said.

44.   Big ships, which produce sulfur dioxide that travels several hundred miles inland, are probably the largest source of emissions in California, the study said.

45.   Biking accounts for more than half a million emergency room visits a year, the study says.

46.   A Cahners Economics study this week said manufacturers expect both production and inventories to grow next year.

47.   A byproduct of chrome plating, stainless steel work and painting, the chromium compound can also trigger asthma attacks and allergic skin reactions, the study said.

48.   A General Accounting Office study said the system failed to meet basic health and safety standards or provide oversight.

49.   A new study says Americans are saving more for retirement but not yet nearly enough.

50.   A new study says heavy use of Tylenol and other brands of acetaminophen increases the risk of kidney failure.