Meet climate scientist Gavin Schmidt in these videos from NOVA's "The Secret Life of Scientists & Engineers." Gavin encourages the use of renewable to combat climate change. Gavin explains that he uses computer models to create a virtual reality map of the earth to figure out why climate changed in the past, why it's changing now, and what it means for the future. For fun, he juggles. This resource is part of the NOVA: Secret Life of Scientists & Engineers Collection.