Anything related to air quality, air pollution, or the atmosphere
"Durham School Services will pay a $90,000 federal fine and do environmental projects worth $348,000 to settle charges that it routinely allowed its school buses to idle excessively in Connecticut, Rhode Island, and Massachusetts. The company operates in 30 states and has one of the largest school-bus fleets in the nation."
"
EPA's upcoming rulings on confidentiality for data going into the companies' GHG calculations will be important. Those determinations may impact whether companies' reporting is accurate — and whether they can ever be held accountable for their emissions.
"The nonprofit group Friends of the Earth filed a lawsuit against the Environmental Protection Agency today to force the regulation of lead emissions from general aviation aircraft under the Clean Air Act."
"Most of the biggest polluting industrial boilers are in manufacturing states east of the Mississippi River, but 68 dot the West coast states."
"Chicago's two coal-fired power plants will shut down sooner than expected under a deal to be announced today by Mayor Rahm Emanuel and environmental groups."
"U.S. environmental regulators have proposed a new rule that limits requirements for factories to hold permits for greenhouse gas carbon emissions to the largest sources such as big coal-fired power plants and big manufacturers."
"High levels of winter ozone air pollution have been recorded in a Utah oil and gas field — after the phenomenon was seen in Wyoming — raising concerns that such pollution could become more widespread."
"For years, the wastes from burning coal and producing copper have enjoyed a second life, used in sand-blasting to remove paint, rust and grime from ship's hulls, storage tanks, bridge trusses and other surfaces. Painting contractors, shipyard workers and thousands of others in Baltimore and across the country are said to use the black, gritty material called slag. Now, though, questions have been raised about whether those who do blasting with ground-up coal or copper slag may be unwittingly exposing themselves to toxic contaminants that could damage their health."
"Fine atmospheric particles — smaller than one-thirtieth of the diameter of a human hair — were identified more than 20 years ago as the most lethal of the widely dispersed air pollutants in the United States. Linked to both heart and lung disease, they kill an estimated 50,000 Americans each year. But more recently, scientists have been puzzled to learn that a subset of these particles, called secondary organic aerosols, has a greater total mass, and is thus more dangerous, than previously understood."
Advertisement 
