Judges on the U.S. Court of Appeals for the District of Columbia Circuit pressed EPA, refiners, biofuels groups and others on EPA’s greenhouse gas, cost and species estimates justifying the renewable fuel standard (RFS) “Set” rule for 2023-2025, and explored the program’s long-term purpose but did not signal a conclusion on this fundamental point. During Nov. 1 arguments oral arguments in the consolidated case Center for Biological Diversity (CBD). v. EPA , Judges Nina Pillard, Michelle Childs and Gregory Katsas...