"Chicken farmers nationwide have stopped feeding their flocks a drug containing arsenic since a 2011 government study suggested the cancer-causing metal may be tainting poultry, but Maryland lawmakers are still struggling with whether to ban the once-widespread practice."

"MONTREAL -- The transboundary movement of spent lead-acid batteries in North America has environmental and public health consequences to communities in Mexico that are the subject of a new investigation by the Secretariat of the Commission for Environmental Cooperation, CEC."

"When biologist Tyrone Hayes discovered that a top-selling herbicide [atrazine] messes with sex hormones, its manufacturer went into battle mode. Thus began one of the weirdest feuds in the history of science."

"In the village of Pithauli, surrounded by ripening mustard fields, a woman hauls a cow carcass on a trolley, drops it in an open field, then runs and hides in a nearby hut as dozens of vultures swoop down."

"The U.S. government will require natural gas drillers to disclose which chemicals they use in hydraulic fracturing on public lands, according to draft rules crafted by the Interior Department."

"One in 10 babies along Minnesota's North Shore are born with unhealthy levels of mercury in their bodies, according to a new report on contamination around Lake Superior, the first to look for the pollutant in the blood of U.S. infants."

"With the specter of past deadly poisonings, the food industry steps up its quest for clean salad greens, testing various industrial washes and other methods like ultrasound."