Some old plants use 19th-century processes that emit tons of mercury.
Some old plants use 19th-century processes that emit tons of mercury. Michael Bryant / Philadelphia Inquirer / MCT
Some old plants use 19th-century processes that emit tons of mercury. Michael Bryant / Philadelphia Inquirer / MCT

Economy

EPA to limit mercury emissions from power plants by 2011

October 23, 2009 6:27 PM

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