"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."

"NEW ORLEANS -- A federal judge presiding over litigation spawned by the massive Gulf of Mexico oil spill has dismissed all claims against the manufacturer of a chemical dispersant that was used to break up crude gushing from BP's blown-out well."

"Frustration and inconvenience are growing in Paulsboro as a risky cleanup proceeds at a deliberately slow pace following the derailment Friday of chemical-laden train cars on a bridge over the Mantua Creek."

Cornfields -- which occupy a big fraction of U.S. farmland -- differ from normal ecosystems in that they are nearly sterile ecologically. Breeding and spraying aim to prevent anything from living but corn.

"We'll start in a cornfield — we'll call it an Iowa cornfield in late summer — on a beautiful day. The corn is high. The air is shimmering. There's just one thing missing — and it's a big thing...

...a very big thing, but I won't tell you what, not yet.

"PAULSBORO, N.J. -- A freight train derailed Friday on a railroad bridge that has had problems before, toppling tanker cars partially into a creek and causing a leak of hazardous gas that was blamed for sickening dozens of people, authorities said."

Concerns about toxic flame retardants in furniture have led to changes, but they have yet to make most furniture much safer.

"Flame retardants in U.S. furniture are on the rise, with a new study finding them in nearly all couches tested."

"New citations against Chemical Waste Management prompt Kettleman City activists, who believe the dump has sickened children, to protest its proposal to grow."

"For drugmaker GlaxoSmithKline, the 17-page article in the New England Journal of Medicine represented a coup. The 2006 report described a trial that compared three diabetes drugs and concluded that Avandia, the company’s new drug, performed best. ... What only careful readers of the article would have gleaned is the extent of the financial connections between the drugmaker and the research."

"Pennsylvania's environmental protection chief is defending his agency's controversial system for testing water wells near Marcellus Shale operations by saying other states work the same way. But regulators in those states say that's not true."

"ST. LOUIS -- A doctoral dissertation that renewed public interest in the military-sponsored chemical spraying of impoverished areas of St. Louis in the 1950s and ’60s has spawned a lawsuit."

"BEIJING -- Some of the world’s best known fashion retailers are selling clothing contaminated with hazardous chemicals that break down to form hormone-disrupting or cancer-causing chemicals when released into the environment, finds a report issued [Tuesday] by Greenpeace International in Beijing."

"HINKLEY -- Underwater home mortgages plague the High Desert at an approximate rate of 60 percent, according to real estate website Zillow.com. But in Hinkley, residents say the entire town is dealing with mortgages above their current assessed values."