On this episode of Parts Per Billion, we do a super-deep dive into a case that the Supreme Court will be hearing in its upcoming term. The case questions how far big businesses must go to clean up their pollution, and we hear from residents of the tiny Montana town where the lawsuit originated. Host: David Schultz. Editors: Marissa Horn and Jessica Coomes. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.