Trees and forests could hold the key to the survival of life on our planet. Meg Lowman started climbing trees when she was still a painfully shy primary school student, in a small town in upstate New York. They became her closest companions whenever her human classmates started bullying her. She eventually became a pioneer of canopy science, and created a system of forest walkways that now extends around the world. She's been hailed as "Einstein of the Treetops", but is better known by the nickname, Canopy Meg. Paul Kennedy visited the self-described "arbonaut" in person to ask her whether trees can save the world.