Efforts by the Biden administration to limit pollution from automobile tailpipes — a major source of planet-warming emissions — face a crucial test as legal challenges brought by Republican-led states head to a federal appeals court.
The U.S. Court of Appeals for the District of Columbia Circuit will hear arguments Thursday and Friday on three cases challenging Biden administration rules targeting cars and trucks. Transportation is the largest source of greenhouse gas emissions that contribute to global warming, and the legal cases could go all the way to the Supreme Court.
