The Vermont Senate passed a bill on Wednesday that would make it the first state to mandate labeling of foods made with genetically modified organisms, or GMOs. Unlike bills passed last year in Maine and Connecticut, which require other states to pass GMO labeling laws before they can be enacted, Vermont’s contains no such trigger clause. The developers of genetically modified crops and the $360 billion packaged food industry pushed for passage of an opposing bill, introduced in Congress last week, that would nullify any law that would require labeling of foods made with GMO crops. Consumers increasingly are demanding to know where their food comes from, advocates say. “We have a growing food movement in which people are demanding more transparency,” said Michele Simon, a public health attorney. But GMO crop developers such as Monsanto and their backers say the biotech crops have been proven to be safe. “This debate isn’t about food safety,” said Karen Batra, spokeswoman for the Biotechnoloy Industry Organization. “Our science experts … point to more than 1,700 credible peer-reviewed studies that find no legitimate concern.” Vermont’s bill, approved 28-2 by the Senate, has passed the state House. It will go back to the House to vote on changes made by the Senate. If passed, the law would take effect in 2016. GMO labeling bills are under consideration in 29 states.