Book excerpt: Twenty-five recent residential projects from around the United States take the concept of “green living” to the next architectural level. Going beyond the simple use of sustainable materials, these houses are designed to frame a very particular vision of nature for their owners that brings them as close as possible to nature while remaining indoors. Featured are dynamic designs by today's most energetic architectural firms including ARO, Tod Williams/Billie Tsien, Diller Scofidio + Renfro as well as up-and-coming smaller firms. Houses vary in scale, complexity, and site to give a broad survey of the potential of this cutting-edge approach.