the stone age didn't end because we ran out of stones
Architect and designer William McDonough asks what our buildings and products would look like if designers took into account "All children, all species, for all time." A tireless proponent of absolute sustainability (with a deadpan sense of humor), he explains his philosophy of "cradle to cradle" design, which bridge the needs of ecology and economics. He also shares some of his most inspiring work, including the world's largest green roof (at the Ford plant in Dearborn, Michigan), and the entire sustainable cities he's designing in China.
the video is a bit long, but really interesting, and the guy has a great, sarcastic, sense of humor. his book, Cradle to Cradle is on the urgent category of my reading list.