Getting trees into the ground isn’t simple. Reforestation often involves trade-offs and challenges. Phoebe Weston checks in on two projects where people are planting trees, and one where it’s not humans doing the planting at all. She and Patrick Greenfield from The age of extinction are back with two new episodes. Help support our independent journalism at <a href="https://www.theguardian.com/sciencepod">theguardian.com/sciencepod</a>
