Whole Foods says its new rating system is a way to talk to farmers and customers about issues that the organic rules don't encompass, like water, energy, labor and waste. Dan Charles/NPR hide caption

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Chef, cookbook author and owner of Washington, D.C.'s Restaurant Nora, Nora Pouillon, in the restaurant's garden. Courtesy of Noras.com hide caption

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Near the Danish city of Ikast, some 1,500 spectators gathered on April 19 to celebrate what has become something of a national holiday at organic dairy farms around Denmark. Courtesy of Organic Denmark hide caption

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Produce is often accompanied by signs like this one at a King Soopers grocery store in Fort Collins, Colo. But customers are often confused by their meaning, which is one reason the Organic Trade Association is trying to raise money for a "checkoff" to pay for consumer advertising and research. Luke Runyon/Harvest Public Media/KUNC hide caption

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The Cornucopia Institute commissioned this photo of an organic egg producer in Saranac, Mich. According to Cornucopia, the facility is owned by Herbruck's Poultry Ranch, which has a license to maintain up to 1 million chickens on this site. Courtesy of The Cornucopia Institute hide caption

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Investigators at the U.S. Department of Agriculture have discovered cases of organic fraud abroad as well as in the U.S. In 2013, 19 farmers or food companies were fined a total of $87,000 for misusing the organic label. Mark Andersen/Rubberball/Corbi hide caption

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Organic fruits and vegetables deliver between 20 and 40 percent more antioxidants than conventional fruits and vegetables, a new study finds. Molly Marshall/Flickr hide caption

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Writer Arlo Crawford (left) with his father, Jim Crawford, an elder statesman of the organic farming movement who dropped out of law school in 1972 to grow vegetables. Melanie McLean/Courtesy of Henry Holt and Co. hide caption

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Empty shelves where eggs should be at a Whole Foods Market in Washington, D.C. The store blames increased demand for organic eggs. Dan Charles/NPR hide caption

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As demand for organic food in Brazil rises, organic produce is getting more affordable. Paula Moura for NPR hide caption

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Employees at Pan Fish USA, a salmon fish farm, unload fish feed on Bainbridge Island, Wash. Ron Wurzer/Getty Images hide caption

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