In a recent ruling, the U.S. Supreme Court in Ohio v. Environmental Protection Agency blocked the EPA from enforcing its “Good Neighbor” rule requiring 23 states to reduce air pollution traveling to downwind states. In this edition of 5Qs, Nicholas Bagley — whose paper “Remedial Restraint in Administrative Law” was cited in Justice Amy Coney Barrett’s dissent — discusses Ohio v. EPA, its broader implications, and the citation of his work.