The Green Planet

PBS | 8:00 pm

Using pioneering camera techniques, Sir David Attenborough reveals how humans are helping plants, many of which face extinction, in the finale episode, "Human Worlds." We rely on plants for almost everything, including the air we breathe and the food we eat. From projects in Africa to reseeding the landscape to rebuilding a Brazilian rainforest tree by tree, everyone can work to make our world a little wilder.