"Enough uncertainty surrounds silver-colored metal dental fillings with mercury that U.S. regulators should add more cautions for dentists and patients, a U.S. advisory panel said on Wednesday."

"Louisiana's 17 refineries averaged 10 upsets a week between 2005 and 2009, according to a study of emission reports by the Louisiana Bucket Brigade, an environmentalist coalition, and the United Steelworkers union."

"In many places around Western Pennsylvania residents see clusters of death and clusters of people sickened by cancer or heart and lung diseases. And, like Lee Lasich, a Clairton resident, they're frustrated that government health and environmental agencies don't see them too, don't do something about the problems and don't take a tougher stance on enforcement of air pollution regulations."

"Owls are dying under gruesome circumstances, bleeding to death from stomach hemorrhages in an agonizing and days-long decline. The culprit: An extra-potent class of rodenticides that has flooded the market in recent decades."

"The latest research on the District's decade-long effort to reduce lead in its drinking water is likely to reverberate well beyond the city's borders and add a chapter to one of the more tortuous public health chronicles of the past century."

"Although Canada will not expose its own citizens to asbestos, its plans to continue exporting the deadly substance to developing countries has drawn widespread condemnation. "

"Fifty percent of thermal paper receipts and most dollar bills tested in a new study are tainted with Bisphenol A, according to a report released Wednesday by the Washington Toxics Coalition."

"At the same time that you're buttering your morning toast, you also may be slathering it with the tiny amounts of the flame retardant PBDE."