Vermont's so-called "GMO Labeling" law goes in effect today. It requires manufacturers to label foods made with genetic engineering. It's the first law of its kind in the nation.

Vermont's law has prompted Congress to look at enacting national standards, even as federal authorities argue genetically engineered crops aren't different from other foods. Kathleen Masterson of Here & Now contributor Vermont Public Radio takes a look at what it means for a plant to be genetically engineered.

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Kathleen Masterson, contributor Vermont Public Radio. She tweets @kathmasterson.