Regulation is key to keeping our air clean, which in turn keeps us healthy. But the Trump Administration has been cutting funding and attempting to slash important clean air rules that jeopardize the planet and our health. What do these policy changes mean, and how can organizations help fight back? Part of the answer is going to federal courts. Nicholas Nassikas, MD, Harvard Medical School, and Andrew Mergen, Harvard Law School, discuss the legal actions the ATS has taken to oppose rollbacks of essential Clean Air Act rules with host Gary Ewart, MHS, chief of advocacy and government relations for the American Thoracic Society.