On February 28, 2022, the U.S. Supreme Court heard oral arguments for the landmark West Virginia v. EPA case, involving the scope of powers delegated to the U.S. Environmental Protection Agency (EPA) through the Clean Air Act. The Court’s decision will affect administrative law, and could have major consequences for environmental law, particularly the Agency’s power to regulate greenhouse gas emissions and take action on climate change. On March 1, the Environmental Law Institute hosted a panel of leading experts to discuss the case, the arguments, and what form the decision may take. This Dialogue presents a transcript of that discussion, which has been edited for style, clarity, and space considerations.