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WASHINGTON - The Bush administration proposed requirements Thursday to cut smog- and soot-forming chemicals from power plants, aiming to curtail pollution that often travels long distances across many states.
The Environmental Protection Agency's plan would cap emissions of sulfur dioxide and smog-causing nitrogen oxide from hundreds of power plants in 30 states, most of them east of the Mississippi River.
EPA Administrator Mike Leavitt said the regulations represent "the largest single investment in any clean-air program in history" and "the largest reduction in air pollution in more than a decade."
He estimated it will cost industry $5.5 billion to comply.
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The proposal, expected to be issued as a final rule in about a year, would cap sulfur dioxide emissions at 3.2 million tons - about a third of current emissions - by 2015. Smog-causing nitrogen oxide would be limited to 1.7 million tons.
That would be a reduction of nearly 70 percent in sulfur pollution and 40 percent in the smog- causing chemical from current levels, the agency said in a statement.