By Valerie Volcovici Washington - The Environmental Protection Agency overstepped its authority by moving to regulate greenhouse gas emissions from power plants and industrial facilities, industry groups and representatives argued in federal court on Wednesday. In the second day of two-day arguments on a case seeking to overturn the agency's proposed greenhouse gas regulations, challengers took on two of the EPA's proposed rules to regulate stationary sources under the Clean Air Act. Wednesday's oral arguments centered on the so-called "tailoring rule," which the EPA issued in 2009 to shield small stationary polluters, such as schools, from having to obtain permits for greenhouse gas emissions
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