"Sarah Kavanagh isn't your ordinary 15-year-old. Sure, the Hattiesburg High School sophomore rides the bus to school and participates in all the typical activities -- everything from Spirit Girls to forensics club. But this Mississippi teen also is behind an online petition to remove a potentially toxic chemical from sodas and sports drinks that are popular with her friends and family."

"A mercury-containing preservative rarely used in the United States should not be banned as an ingredient in vaccines, U.S. pediatricians said Monday, in a move that may be controversial."

"DEPUE, Ill. -- This tiny village tucked into the Illinois River Valley is known for its lake, a tranquil body of tree-lined water that has drawn thousands of spectators to a national boat race for nearly 30 years. But most visitors heading to Lake DePue must pass another village landmark before reaching the shore — a pile of contaminated slag weighing at least 570,000 tons that looms over the main road into town, left behind by a zinc smelter that employed many locals for decades."

"The low-income neighborhood of older wood-frame homes in West Dallas is a far cry from the suburb of newly built brick houses in Frisco 30 miles to the north. But the two North Texas communities share a bond: Both were contaminated by industrial lead for nearly half a century."

"PARIS -- The French parliament voted Thursday to ban the use of bisphenol A, a chemical thought to have a toxic effect on the brain and nervous system, in baby food packaging next year and all food containers in 2015."

"Reviving a 20-year debate over illnesses of veterans of the 1991 Persian Gulf war, a new scientific paper presents evidence that nerve agents released by the bombing of Iraqi chemical weapons depots just before the ground war began could have carried downwind and fallen on American troops staged in Saudi Arabia."

Brominated vegetable oil, an ingredient in many commercial drinks, may have harmful health effects. But a loophole in the law allows its health effects to go unevaluated, grandfathering it and many other ingredients in as "generally recognized as safe."

"D-CON kills rats and mice, the label reads. And, according to state and federal officials, it can kill hawks, owls, eagles, foxes, bobcats, mountain lions and other non-targeted wildlife too."

"Spurred by mounting scientific evidence, the U.S. Environmental Protection Agency is initiating a new effort to examine whether low doses of hormone-mimicking chemicals are harming human health and whether chemical testing should be overhauled."

"SIMI VALLEY, Calif. -- Lingering radioactive contamination exists at a former rocket test lab outside of Los Angeles that was the site of a partial nuclear meltdown, federal environmental regulators said Wednesday."

"Representative Edward Markey and some of his congressional colleagues are imploring the US Food and Drug Administration to investigate hair straightening treatments, such as the popular Brazilian Blowout, that contain formaldehyde, a carcinogen. ..."

Negotiations over an international treaty to combat mercury emissions will reach a climax next month in Geneva.

"Hospitals are on red alert and parts of Buenos Aires have been evacuated as a toxic cloud descends upon the city."

"Major retailers are violating California law by failing to warn consumers about diaper-changing pads, nap mats and other baby products made with unsafe levels of a flame retardant linked to cancer, according to legal notices expected to be filed Thursday."

"About two months after the state's environmental agency ordered a major pet products retailer to immediately cease selling unregistered pesticide products, many of those products remain on the retailer's shelves and website."