"The Federal Railroad Administration said it is investigating the safety of transporting crude oil by rail, including whether chemicals used in hydraulic fracturing are corroding tank cars."

"Federal scientists investigating an unusually high number of dead bottlenose dolphins washing up on the East Coast said on Thursday the carcasses are showing up at a rate that is seven times higher than usual."

"MAYFLOWER, Ark. -- In the week after an oil spill strangled the air in Ann Jarrell's neighborhood, tens of thousands of her bees either died or went mad."

"WASHINGTON — As part of the climate change agenda he unveiled this year, President Obama made a commitment to significantly reduce the federal government’s dependence on fossil fuels. The government, he said in a speech in June at Georgetown University, 'must lead by example.' But just two miles from the White House stands the Capitol Power Plant, the largest single source of carbon emissions in the nation’s capital and a concrete example of the government’s inability to green its own turf."

"A year ago, the Fish and Wildlife Service was poised to use a scientifically flawed range map for the American burying beetle during a preliminary assessment of the Keystone XL pipeline's effect on the endangered insect."

"In April, the U.S. Centers for Disease Control and Prevention raised to 535,000 its estimate of the number of American children with potentially dangerous levels of lead in their blood."

"California billionaire Thomas Steyer is taking his fight against climate change to Virginia, helping to buy TV ads criticizing Republican gubernatorial candidate Ken Cuccinelli."

"NEW YORK -- All of the notices U.S. regulators received to vouch for the safety of common food additives between 1997 and 2012 were submitted by people who had a vested interest in the outcome of those assessments, according to a study published in JAMA Internal Medicine on Wednesday."

"BP Plc said Monday it has discovered new evidence of fraud and conflicts of interest in the program that is paying billions of dollars to businesses and residents who claimed they were harmed by the 2010 Gulf of Mexico oil spill."

"Last week's much-touted White House meeting between Obama administration environmental leaders and West Virginia Democrats on coal was part of what advocates are calling an increasing dialogue between both sides of the contentious debate."