On Monday the Supreme Court declined to hear a case (Alliance of Automobile Manufacturers v. EPA) brought by a coalition of automobile manufactures and fuel companies that sought to limit the use of E15 in fuel. The groups challenged a partial EPA waiver that allowed E15 to be used in certain cars and light trucks. By declining to hear the case, the Court let stand a decision by the D.C. Circuit that the trade associations lacked standing to challenge EPA’s approval of E15.

In other news, the Supreme Court agreed to hear an appeal from the Obama Administration (EPA v. EME) that seeks to overturn a lower court ruling that held EPA’s Clean Air Act cross-state pollution rule was invalid.