"CHARLESTON, W.Va. -- People with C8 in their blood face a greater risk of having chronic kidney diseases, according to the latest in a series of West Virginia University studies on the toxic chemical."

Domestic drinking water wells in the region around Augusta, Maine, show levels of arsenic above EPA's new safety standards. Excess arsenic in drinking water can cause a range of serious health problems.

"President Barack Obama put a stop on Friday to new rules that would limit smog pollution, unexpectedly reversing course on a key policy measure after businesses said it would kill jobs and cost them billions of dollars."

The smoke from wildfires can have harmful effects on human health, especially for children, seniors, and the chronically ill.

"A new study says firefighters who toiled in the wreckage of the World Trade Center in 2001 were 19 percent more likely to develop cancer than those who were not there, the strongest evidence to date of a possible link between work at ground zero and cancer."

"Bird flu was in decline -- but health officials warned Monday that it appears to be on the rise again. The United Nations' Food and Agriculture Organization (FAO) "urged heightened readiness and surveillance against a possible major resurgence" of the virus, which has crossed over from birds to infect 565 people and kill 331 of them since its appearance in 2003."

"When it comes to the safety of dyeing food, the one true shade is gray.

Artificial colorings have been around for decades, and for just about as long, people have questioned whether tinted food is a good idea. In the 1800s, when merchants colored their products with outright poisons, critics had a pretty good case. Today’s safety questions, though, aren’t nearly so black and white — and neither are the answers.

"Five of the 57 ingredients in dispersants approved by the U.S. Environmental Protection Agency for use on oil spills are linked to cancer, finds a new research report based on data obtained through a Freedom of Information Act request by environmental groups on the Gulf of Mexico."

"Hundreds of Native American children attend schools that haven’t properly disposed of hazardous waste, haven’t contained asbestos in heating systems, and whose water systems exceed the maximum allowable level for arsenic in tap water – conditions barred under federal environmental laws."