Environmental problems persist, so federal judges hearing environmental cases are struggling to make sure this litigation doesn't grind to a halt.On today's episode of Parts Per Billion, legal reporter Ellen M. Gilmer talks about the many virus-related delays in these cases and about one case over the controversial Dakota Access Pipeline in which a judge decided a hearing must go on.(Note: After the recording of this episode, the judge in the Dakota pipeline case issued a ruling. Visit news.bloombergenvironment.com for breaking news coverage.) Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.