The Utility Air Regulatory Group filed a petition for review December 13 in the U.S. Court of Appeals for the District of Columbia Circuit challenging the Environmental Protection Agency and the National Highway Traffic Safety Administration’s October fuel economy and greenhouse gas emissions standards for light-duty trucks and model years 2017 to 2025. The final rule requires light-duty vehicles to achieve an average of 54.5 MPG by 2025 if GHG reductions are achieved primarily through fuel economy improvements.