Vermont is poised to become the first state to require the labeling of genetically modified organisms in food products. Governor Peter Shumlin said he would sign the pro-GMO-labeling bill as early as this week. The new law would take effect in July 2016 and would also make it illegal to label foods containing GMOs as “all natural” or “natural.” Vermont could prove to be the tipping point in a national movement to inform consumers about whether their food contains GMOs. Twenty-nine other states have proposed bills requiring labeling this year, and two have already passed similar bills. But those measures only take effect when neighboring states also approve the requirements. We speak with Vermont State Sen. David Zuckerman, who first introduced GMO labeling bills more than a decade ago when he served in the House.