"The U.S. Environmental Protection Agency said Wednesday that total toxic air releases in 2011 declined 8 percent from 2010. In the mid-Atlantic region, which includes Pennsylvania and Delaware, the agency recorded a decline of 13.8 percent or 32.5 million pounds. Among the hazardous air pollutants showing declines were hydrochloric acid and mercury, which EPA attributed to improved pollution control technologies at coal-fired power plants and a shift to other fuel sources."

"Citgo Petroleum Corp. reached an agreement with New Hampshire to be dismissed from an $816 million trial over groundwater contamination while a settlement is completed, as a witness testified that 2 percent of the state’s private wells are polluted with hazardous levels of the chemical MTBE."

"Just like the controversial compound it's designed to replace, a chemical used in cash register receipts and other consumer products messes with hormones, according to research published today."

"The world's most widely used insecticide has for the first time been officially labelled an 'unacceptable' danger to bees feeding on flowering crops. Environmental campaigners say the conclusion, by Europe's leading food safety authority, sounds the 'death knell' for the insect nerve agent."

"DAVIS, Calif. -- What causes autism? The question has spurred about a billion dollars' worth of genetics research that has found no clear answer. But University of California, Davis, epidemiologist Irva Hertz-Picciotto has been pursuing another angle: Does the environment around a pregnant woman play a role in determining whether her child develops autism?"

"BP and its partners in the Macondo well that released an estimated 4.9 million gallons of oil over three months beginning in April 2010 should be required to inform state officials -- and the public -- of the toxic materials included in the spill, and the potential health effects of those materials, a three-judge appellate panel ruled in New Orleans on Wednesday."

"GENEVA -- Mercury pollution in the top layer of the world's oceans has doubled in the past century, part of a man-made problem that will require international cooperation to fix, the U.N.'s environment agency said Thursday."

"Last week, federal lawmakers trumpeted the passage of the Drywall Safety Act of 2012 as a bipartisan victory for thousands of homeowners harmed by contaminated drywall."

A French scientist has published a study indicating that plastic additives called phthalates, thought to be endocrine disruptors, are widely found in one species of ants -- presumeably because they have become widespread in the environment.

"The most ubiquitous danger at firing ranges has a lot to do with bullets but nothing to do with getting shot."