Supporters argue people should know if food contains GMO ingredients.
Opponents say GMOs are safe and that labels will increase prices while unnecessarily frightening consumers. A study shows they've spent $3.7 million on campaign donations and lobbying to block the measure — seven times what supporters have spent.
Vermont, Connecticut and Maine have labeling laws, but the Connecticut and Maine laws won't be enacted until other states follow suit. If New York requires labels, Connecticut's law would automatically take effect.
Lawmakers haven't set a vote on the measure.