"For the first time in more than 65 years, dengue has returned the continental United States, according to an advisory the Centers for Disease Control and Prevention issued in late May. While a few cases were reported earlier, they were primarily in Americans who had caught the virus abroad or at the Texas-Mexico border."

"There are 'large gaps' in data now being gathered on the health of the 34,000 workers cleaning up the largest oil spill in U.S. history and growing concern that BP Plc will fail to publicize problems if they arise." Those concerns came up at an Institute of Medicine hearing Tuesday.

"The director of the national institute that oversees environmental health research said Monday that a new study raises many important questions about how flame retardants in common household items may pose a threat to the health of pregnant women and their infants."

Petrochemical companies like BP won a key battle in achieving unpoliced self-regulation early in the Bush administration -- when they got friends in Congress and the White House to shut EPA out of chemical safety and security oversight. As public health advocates point to possible disasters more lethal than the Gulf spill, there may be an opportunity to reverse the federal government's decisions not to protect the public from petrochemical disasters.

"The Quebec government is breathing new life into Canada's dying asbestos industry. The province is close to backing a loan of $58 million to reopen a mine in the town of Asbestos, a cash injection that could keep it operating for the next 25 years."

"U.S. EPA has quietly released a full list of ingredients in the two controversial dispersants BP PLC is using to combat the Gulf of Mexico oil spill, following weeks of complaints from members of Congress and public health advocates that the dispersant manufacturer had kept its complete formula a secret from the public."

Tonight CNN completes its two-day special report, "Toxic America," detailing some of the ways Americans are exposed to toxic chemicals, their effects, and what can be done to reduce human exposure.