UCLA Emmett Institute faculty members Cara Horowitz, Julia Stein, Benjamin Harris, Beth Kent, and Siyi Shen submitted an amicus brief on January 21, 2021, to the U.S. Court of Appeals for the D.C. Circuit challenging the Trump administration’s rollback of federal vehicle pollution and fuel economy standards. The brief was filed on behalf of Sen. Tom Carper, chairman of the Senate Environment and Public Works Committee, and Rep. Frank Pallone Jr., chairman of the House Committee on Energy and Commerce.