In the ever-complicated debate over labeling of genetically modified foods, Agriculture Secretary Tom Vilsack offers this idea: Use your smartphone.

Vilsack told members of Congress on Wednesday that consumers could just use their phones to scan special bar codes or other symbols on food packages in the grocery store. All sorts of information could pop up, such as whether the food's ingredients include genetically modified organisms, or GMOs.

"Industry could solve that issue in a heartbeat," Vilsack said during a House hearing on agriculture spending.

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