The U.S. Supreme Court has agreed to hear challenges from Oklahoma and Utah, along with several energy companies, regarding the Environmental Protection Agency's (EPA) authority to transfer lawsuits related to clean air regulations from regional courts to the D.C. Circuit. The cases, including Oklahoma v. EPA and PacifiCorp v. EPA, will address whether disputes over the EPA's clean air policies, particularly concerning interstate pollution and Good Neighbor ozone plans, should be adjudicated in Washington or other regional federal circuits. This review is significant as it could influence the EPA's capacity to defend its regulations, especially those that involve state plans, in a court perceived as more favorable to environmental regulations. The Supreme Court's decision will have implications for the agency's regulatory power under the Clean Air Act.