The big blue buildings of Ikea have sprouted solar panels and wind turbines; inside, shelves are stocked with LED lighting and recycled cotton. Why? Because as Steve Howard puts it: "Sustainability has gone from a nicetodo to a mustdo." Howard, the chief sustainability officer at the furniture megastore, talks about his quest to sell ecofriendly materials and practices both internally and to worldwide customers and lays a challenge for other global giants.

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