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A fresh organic strawberry ripen's on a vine on the Clark Valley Organic Farm in Los Osos, California June 7,2006. As the nation's largest grocery retailer, Wal-Mart has decided that offering more organic food will help modernize its image and broaden its appeal to urban and other upscale consumers. Wal-Mart's interest is expected to change organic food production in substantial ways. Photo/Phil Klein/Corbis (UNITED STATES)