High Court Declines Asarco Appeal Of EPA Sulfur Dioxide Rule

Law360, New York (January 22, 2013, 2:42 PM EST) -- The U.S. Supreme Court refused Tuesday to hear copper mining firm Asarco LLC's appeal of a decision upholding federal emissions standards for sulfur dioxide, solidifying the U.S. Environmental Protection Agency's decision to cap concentration of the chemical at 75 parts per billion.

The Groupo Mexico SAB subsidiary had accused the D.C. Circuit of shirking its responsibility to ensure the EPA didn't act outside its powers under the Clean Air Act when it set the National Ambient Air Quality Standard — which has since been partially delayed...
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