"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."

"The compromise agreement to extend the payroll tax cut does not include a provision to delay and soften Environmental Protection Agency boiler pollution regulations, according to a Capitol Hill aide familiar with the final deal."

"A long road for environmental groups appears to have ended Tuesday when the U.S. Environmental Protection Agency released final rules on regulating pollution from plants producing polyvinyl chloride."

"Around the world, breathing a variety of air pollutants – in some cases for a single day – increases the chance that people will suffer heart attacks, according to a new analysis published Tuesday. For the first time, scientists analyzed previous studies from five continents to verify and quantify the links between air pollution and heart health. They found that short-term exposure – less than seven days – to all major air pollutants except ozone was associated with an increase in heart attacks.

"Religious-right leaders are slamming a green evangelical group for casting support for Environmental Protection Agency rules to cut power plant mercury emissions as a 'pro-life' position." (EPA says the new standards "will avert up to 11,000 premature deaths, 4,700 heart attacks and 130,000 asthma attacks every year.")

"When US government scientists began sampling the air from a tower north of Denver, Colorado, they expected urban smog — but not strong whiffs of what looked like natural gas. They eventually linked the mysterious pollution to a nearby natural-gas field, and their investigation has now produced the first hard evidence that the cleanest-burning fossil fuel might not be much better than coal when it comes to climate change."

"TEHACHAPI, Calif. -- At the end of an empty road just north of Highway 58 and past the outfield wall of an abandoned high school looms the towering Lehigh Southwest Cement plant -- a behemoth kiln that belches mercury and other toxics into the air, as it has for decades."