The Eleventh Circuit vacated EPA's 2011 disapproval of Alabama SIP provisions on opacity, thereby reinstating EPA's 2008 approval of opacity limits. EPA's 2011 disapproval was unauthorized by the CAA because EPA failed to make the statutorily required error determination. Neither the text of the fin...

The D.C. Circuit vacated EPA's 2012 projection of cellulosic biofuel production under the renewable fuel standard (RFS) program. As part of the RFS program, CAA §211(o)(7)(D)(i) requires EPA to determine the "projected volume of cellulosic biofuel production" for each calendar year based on an esti...