"RALEIGH, N.C. — Environmental and wildlife officials in North Carolina and Virginia signed an agreement with Duke Energy Monday for the cleanup of toxic coal ash from the Dan River, which flows through the two states."

"The U.S. Supreme Court ruled Monday that a federal law seeking to improve accountability for environmental spills and pollution can be circumvented by certain kinds of state laws."

"Design problems with a blowout prevention system contributed to the 2010 Deepwater Horizon oil rig disaster, and the same equipment is still commonly used in drilling four years after the Gulf of Mexico oil spill, according to a report issued by the federal Chemical Safety and Hazard Investigation Board."

"Citing what he said was 'extensive scientific evidence,' a federal judge has ruled for the first time that conductivity pollution from mountaintop removal mining operations is damaging streams in Southern West Virginia."

"Hundreds of scientists have signed a letter sent to Canada’s prime minister blasting a federal review recommending the approval of the Northern Gateway tar sands pipeline as biased, Canadian media reported."

"A new University of Waterloo report warns that natural gas seeping from 500,000 wellbores represent 'a threat to environment and public safety' due to groundwater contamination, greenhouse gas emissions and explosion risks wherever methane collects in unvented buildings and spaces."

"For months, a company that stores giant mounds of petroleum coke on Chicago's Southeast Side has maintained it had nothing to do with gritty clouds of dust blowing into surrounding neighborhoods or black residue staining the sides of nearby houses."

"Carbon monoxide (CO), nitrogen dioxide (NO2), and particulate matter (PM) are harmful air pollutants that pose significant short- and long-term health risks. Emitted from coal-fired power plants, vehicle exhaust pipes, and other combustion sources, they’re among six primary pollutants monitored by the U.S. Environmental Protection Agency (EPA) through the Clean Air Act. These same pollutants are also some of the most common contributors to unhealthy air inside U.S. homes, due in part to a ubiquitous and possibly surprising activity: cooking."

"Officials from the U.S. Fish and Wildlife Service and U.S. Coast Guard announced Monday they were working to mitigate damage from a spill of crude oil within the Delta National Wildlife Refuge."

"In a rare unilateral action, Delaware regulators have commissioned a wide-ranging environmental evaluation at the idled Evraz Claymont Steel plant, a longtime source of problems ranging from metallic soot and mercury to toxic contaminants in soil and groundwater."