"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."

"CHEYENNE, Wyo. -- Gov. Matt Mead has joined those expressing disappointment that the U.S. Environmental Protection Agency has extended for a third time a public comment period on a report on groundwater pollution in a Wyoming gas field rather than moving toward wrapping up the study."

"Henry David Thoreau was a peculiar fellow. After his secluded stint at Walden Pond, his fixation with the natural world only grew. Starting in 1852, his journal turned into a two million-word project documenting seasonal observations around his small Massachusetts township, Concord. Over the next six springs he could be seen racing about town like a madman in an effort to spot and record that year’s first elusive blooms, all the while taking notes."

"There are few new EVs, but plenty of performance cars -- with eco mode. Yes, it's possible to drive a rip-roaring V-8 Corvette and get nearly 30 mpg."

"A bat from Mammoth Cave National Park has been confirmed to have developed the deadly white-nose syndrome, authorities announced today."

"Barack Obama's top adviser on oil drilling and the management of America's last wide open spaces announced on Wednesday that he would leave the cabinet by March. The departure of Ken Salazar as interior secretary leaves Obama with virtually a clean slate to remake his energy and environmental team."

"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?"

"Marcia McNutt, who resigned as director of the US Geological Survey, says hurricane Sandy has left communities exposed."

"WASHINGTON -- More than 10 weeks after Superstorm Sandy brutalized parts of the heavily populated Northeast, the House approved $50.7 billion in emergency relief for the victims Tuesday night as Republican leaders struggled to close out an episode that exposed painful party divisions inside Congress and out."