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

toggle caption Luke Runyon/Harvest Public Media/KUNC

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

toggle caption Mark Andersen/Rubberball/Corbi