"President Barack Obama has vowed to tackle climate change in his second term, but so far has not acted to strengthen a tool that does not require backing from Congress - the National Environmental Policy Act."

"[Tuesday's] Supreme Court decision significantly expanding the rights of property owners to challenge the terms of land-use permits has puzzled environmental law experts and has liberal groups accusing the conservative justices of judicial activism."

"COLUMBUS, Ohio -- Federal environmental regulators are investigating a January chemical emergency at an Ohio oil well and asking why an inventory of the facility's chemicals wasn't available to local authorities, according to a letter released Wednesday by a coalition of activists."

"WASHINGTON -- President Obama, declaring that 'Americans across the country are already paying the price of inaction,' announced sweeping measures on Tuesday to reduce greenhouse gas pollution and prepare the nation for a future of rising temperatures."

"In a win for the U.S. Environmental Protection Agency, the Supreme Court on Monday agreed to consider the legality of a controversial Obama administration effort to regulate air pollution that crosses state lines."

"In 2006, the EPA’s Chicago office told Midwestern fertilizer dealers it found problems with nearly all their safety plans for poisonous anhydrous ammonia. Fix them, the EPA wrote the dealers, or face possible fines."

"Federal prosecutors unveiled new criminal indictments on Wednesday against a former BP Plc executive and a former BP engineer charged with obstructing investigations into the April 2010 Gulf of Mexico oil spill."

"As the Environmental Protection Agency seeks public comment on how to gauge the environmental impact of a proposed gold and copper mine in the Bristol Bay watershed, hundreds of thousands of Americans have weighed in on one side or another."

"Illinois Gov. Pat Quinn on Monday signed into law the nation's strictest regulations for high-volume oil and gas drilling."