This week, in time for Earth Day, Studio 360 saves the planet. Kurt Andersen asks a priest about the Vatican's declaration that pollution is a modern sin. Then we explore design solutions for a changing environment. Kurt visits a solar-powered subway station in Coney Island and talks to an engineer making biofuel from bacteria. Plus, the creative thinkers behind a hand-cranked street generator, the adobe house of the future, carbon-neutral rock shows, and the Eco Art movement.