Margaret’s practice focuses primarily on matters arising under the Clean Air Act and state air quality statutes. She advises clients on state and federal clean air policy, permitting, compliance, and enforcement matters. She helps clients prepare comments on proposed federal and state air quality rules, advises clients on compliance issues and helps obtain construction and operating permits. She has successfully challenged final rules issued by the EPA before the U.S. Court of Appeals for the DC Circuit. She has also effectively defended electric utilities in Clean Air Act enforcement actions brought by the EPA and the Sierra Club.