"A leading environmental group filed a court challenge today to the Food and Drug Administration's handling of bisphenol A, aiming to force the agency to act on a 20-month-old request to bar the controversial chemical from food packaging."

"Compounds associated with neurological problems, cancer and other serious health effects are among the chemicals being used to drill natural gas wells in Pennsylvania, although state and industry officials said Monday the practice is not polluting drinking water."

"Scientists say methyl bromide threatens the ozone layer, and its alternative, methyl iodide, is a threat to workers and their families."

"Federal rules governing pesticide experiments using people as test subjects must be rewritten and issued for public comment under a new agreement reached between the U.S. Environmental Protection Agency and public health groups, farm worker advocates and environmental organizations."

"In the intense but inscrutable debate about the chemicals that drillers inject underground to flush out natural gas, this much can be said: Everyone is for disclosure."

"The Environmental Protection Agency has decided to delay enforcing a new lead-paint regulation following pressure from home builders and members of Congress."

"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."

The Superfund tax on oil and chemical companies that helped support cleanup of abandoned hazardous waste sites expired in 1995. Now the Obama administration plans an effort to revive it.

"Environmental groups filed two new major lawsuits Thursday, aimed at forcing the coal industry to stop violations of water-quality limits for toxic selenium."

"As arguments rage over how to clean up the Deepwater Horizon oil spill, an examination of toxicity tests reveals flaws in the data used to determine the safety of dispersants."