"World's Greenest Homes" is an entertaining, fun, access-all-areas tour of some of the most extraordinary, innovative and beautifully-designed homes on the planet. Forget the granola, sandals, beards and geodesic domes: green is cool, liveable and gorgeous. "World's Greenest Homes" a whirlwind global tour of beautiful and sexy homes that also happen to be the most planet-friendly around. (Source: HGTV)