From the arid deserts of Tucson, Arizona to the icy forests of Poori, Finland to the tropical beaches of New South Wales, Australia to the urban jungle of downtown Manhattan, critics Alanna Stang and Christopher Hawthorne have traveled to the farthest reaches of the globe to find all that is new in the design of sustainable, or "green," homes. The result: more than thirty-five residences in fifteen countries -- and nearly every conceivable natural...