WORLD'S GREENEST HOMES takes viewers on tours of houses that have been designed to be both stylish and environmentally friendly. From Indiana to Australia, host Emmanuel Belliveau travels the world to get a close-up look at some of today's most spectacular "green" houses, whose owners have committed themselves to invest in dwellings that conserve energy and make the most of local resources. Homeowners offer explanations about their choice of materials and other structural details, pointing out how these choices were made to make the home as green as possible. Belliveau, who's also a designer, occasionally discusses other eco-friendly alternatives, and the show also deals with the specific architectural designs of each residence, demonstrating how these works of art function as environmentally sustainable living spaces.