"Exposure to mercury pollution could be hitting some wild birds' reproductive prospects hard by causing males to pair with other males."

"California regulators approved a pesticide Wednesday for use by fruit and vegetable growers despite heavy opposition from environmental and farmworker groups that cited its links to cancer."

"The water in almost 15,000 D.C. homes that received repairs during a massive effort to remove lead pipes may still be contaminated by dangerous levels of the metal, according to a report released Wednesday by the Centers for Disease Control and Prevention."

"The Senate passed a sweeping overhaul of the nation’s food safety system on Tuesday, after tainted eggs, peanut butter and spinach sickened thousands of people in the last few years and led major food makers to join consumer advocates in demanding stronger government oversight."

"Old splits between rich and poor nations re-emerged on Tuesday over a plan to slow global warming, but both sides maintained a 'balanced package' is the goal of U.N. talks in Mexico."

"A coalition of 20 environmental groups took to the airwaves today in their escalating pushback against a $7 billion Canadian oil sands pipeline, launching a two-week ad campaign urging President Obama to 'prevent the next oil disaster' by rejecting a permit for the project."