Some businesses go green by having bicycle-operated blenders. Others do it by redefining what "acceptable packaging" is for an entire category of retail products. We talk with Sean Meenan, owner of New York's first solar-powered restaurant, Habana Outpost, along with Candace Taylor, director of sustainability for the world's largest retailer, Wal-Mart. They share with us the unique challenges and opportunities they each face ? as a small business and an enormous one ? in staying green, staying afloat, and setting an example for businesses and consumers.

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