Held v. Montana was the first of the youth climate cases to make it past many procedural hurdles over many years and arrive in a trial court in Helena, MT. There, over seven days (June 12-20, 2023), Judge Kathy Seeley heard from the 16 young plaintiffs as well as world-renowned experts, including Dr. Mark Jacobson, on the effects of climate change in the world overall and specifically in Montana—temperatures warming, glaciers melting, rivers drying up, forests burning, air-quality alerts becoming more common.