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Mr. Bush's "Clear Skies" proposal, designed to reduce the sulfur dioxide, nitrogen oxide, and mercury emitted by coal-burning power plants and other industries, does not include carbon dioxide, the main greenhouse gas (GHG). In the US Court of Appeals for the District of Columbia last week, 12 states (California, Connecticut, Illinois, Maine, Massachusetts, New Jersey, New Mexico, New York, Oregon, Rhode Island, Vermont, and Washington), along with the cities of Baltimore, New York, and Washington, argued for reducing GHGs under current law. "The Clean Air Act specifically requires EPA to reduce emissions of pollutants that threaten public health and welfare, and names impacts on climate as one of the threats," says Philip Clapp, president of the National Environmental Trust, one of the private groups supporting the states' lawsuit. "We expect the court will determine that EPA not only has the authority to reduce global-warming pollution, but has a duty to do so." ... For CO2, there's no catalytic converter," said Deputy Assistant Attorney General Jeffrey Clark. "There's no catch mechanism. The only way to reduce them is through fuel economy. The point is it would usurp NHTSA's authority." Siding with the administration here are many industry groups as well as 11 other states, including ones that produce oil and gas, automobiles, and coal-powered energy.http://www.csmonitor.com/2005/0413/p03s01-uspo.html
Platinum-group minerals in alpine chromitites from southwestern Oregon
Harlan W. Stockman, and Paul F. Hlava
Sandia Natl. Lab., Albuquerque, NM, United States
Electron microprobe and scanning electron microscopy. The platinum-group minerals found in the chromitites are laurite, porous Ru-rich alloys, Os-Ir- and Pt-rich alloys with highly variable compositions, an Ir-Cu-rich sulfide, a Pt arsenide, and three relatively rare platinum-group sulfides. The platinum-group minerals are 1 to 30 mu m in diameter and occur as inclusions in chromite grains; some of these inclusions also contain silicates and millerite. Base metal alloys (largely Ni-Fe) occur in cracks in the chromitites, along with magnetite, ferritchromite, chromian chlorite, and serpentine. The primary platinum-group mineral assemblage is interpreted to have formed before or during crystallization of the chromite grains and not as a result of exsolution from the chromite.--Modified journal abstract. http://econgeol.geoscienceworld.org/cgi/content/abstract/79/3/491

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