EPA still has not complied with requests from two Congressional investigating committees for documents on its decision to deny California and some 16 other states waivers allowing them to regulate tailpipe greenhouse emissions.

Henry Waxman (D-CA), the chairman of the House Oversight Committee, has vowed to investigate EPA's decision to prohibit states from regulating greenhouse emissions.

EPA has proposed exempting farms from a law protecting the public from toxic air pollutants. Environmental groups have objected.

Vehicle fuel economy is a major component of the ongoing energy and carbon discussions, so it's helpful to know how the current models are performing.

EPA is required to update its standard for each of the six main "criteria" air pollutants every five years.

Scientists advising the U.S. Environmental Protection Agency on air pollution issues are criticizing EPA higher-ups for ignoring their scientific counsel. Specifically, they are accusing the Bush Administration of excising science from the process the agency uses to determine how clean the air we breathe should be. The Clean Air Scientific Advisory Committee (CASAC) challenges EPA administrator Stephen L. Johnson.

Along with the usual spooky and spine-tingling sights we have come to expect in caves, another scary inhabitant is turning up — contaminants such as PCBs, pesticides, dioxins, gasoline, fertilizers, sewage, and caffeine. These pollutants, which are leaching into caves from the surface and groundwater, can pose a threat to the delicate underground environments that are prized by many, and that provide benefits to people, plants, and animals on the surface. The presence of these contaminants underground also serves as a blunt reminder of how pervasive pollutants are.

The US military has created at least 31,487 toxic sites at 4,624 military facilities or properties. Many of these have been cleaned up to some degree over the past few decades, but 7,056 still haven't had any cleanup, nor is there an accepted cleanup plan in place, according to the Sept. 18, 2008, testimony of Wayne Arny (703-695-2880), Deputy Under Secretary of Defense, before the Senate Environment & Public Works Committee.

A voluntary program designed to reduce nonpoint (diffuse) sources of coastal water pollution caused by boating has been slowly expanding since the late 1990s.

On June 11, the US Supreme Court unanimously decided to allow polluters who engage in voluntary Superfund site cleanups to recoup costs from other responsible parties.