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Architect William McDonough looks at private sector efforts on sustainable design

From turning corporate headquarters into green building showcases to retooling the design process for consumer goods, architect William McDonough has worked to bring sustainable design into the mainstream. He joins OnPoint to discuss what he calls "ecologically intelligent design," and the book -- "Cradle to Cradle" -- he authored on the subject. McDonough also discusses his efforts in China, where he is designing several major cities to be more energy efficient and to use renewable sources of energy. Plus, he explains why indoor air quality and household toxics may be the next major environmental issues facing manufacturers.