Premieres Wednesday, April 16, 2025 at 9 p.m. on KPBS TV / PBS app + Encores Sunday, April 20 at 2 p.m. on KPBS TV and 9 p.m. on KPBS 2. Can forests help cool the planet? Follow scientists through spectacular landscapes as they study complex networks of trees, fungi, and creatures large and small – all in a quest to tackle the twin threats of climate change and species extinction.