In a landmark decision, the U.S. Supreme Court has overturned the EPA’s “Good Neighbour” rule, halting state obligations to curb air pollution affecting neighbouring regions. The 5-4 ruling emphasizes the need for clearer congressional mandates for such regulations, reflecting the Court’s conservative stance on federal agency authority. Additionally, the Court abandoned the Chevron deference, restricting agencies like the EPA from interpreting ambiguous laws without explicit congressional approval, complicating future environmental regulation efforts.
