The debate over GMO labeling is heating up, but it's clear where consumers stand.

Nearly 90 percent of Americans want mandatory labeling on genetically modified foods, according to a new poll of 800 registered voters commissioned by a coalition of consumer and environmental groups, including Consumers Union, the policy and advocacy arm of Consumer Reports. These results confirm previous polls by Consumer Reports and other groups, which also show overwhelming support for GMO labeling.

In July 2016, Vermont will become the first state to require that GMO foods be labeled as such. But that law is being challenged.

In October, the U.S. Court of Appeals for the Second Circuit heard arguments to overturn a lower court’s decision to allow the Vermont law to go forward while a lawsuit brought by the Grocery Manufacturers Association and other food industry organizations to block the law was being argued. This past summer, the House of Representatives passed the Safe and Accurate Food Labeling Act of 2015 (H.R. 1599)—otherwise known as the DARK (Deny Americans the Right to Know) Act—which would nullify existing state labeling laws, ban any future laws to require labeling, and only allow voluntary labeling on the part of the manufacturer. And currently, some lawmakers want to add a provision to the omnibus spending bill that would block states from requiring GMO foods to be labeled.

Meanwhile, the Food and Drug Administration approved the sale of genetically modified salmon in November and won’t require that it be labeled. In an op-ed in The New York Times, Consumers Union senior scientist Michael Hansen, Ph.D. described this decision as an abuse of consumer trust. “When it comes to food, consumers deserve rigorous safety testing for human and environmental risks and meaningful labels they can use to decide what to eat. They got neither,” he wrote.

The poll also asked whether consumers would prefer to get information on GMOs in a food via a scannable bar code or QR code on the package, which some members of the food industry suggest would be a good alternative to on-package labeling. Just 8 percent said they would, while 88 percent said they would prefer a printed label.

“Not everyone has a smartphone or lives in an area with reliable Internet service,” says Jean Halloran, director of food policy initiatives for Consumers Union. "And even for those who do, it’s inconvenient to have to scan every food you put into your grocery cart.”

Companies could also collect information about consumers who scan the bar codes, raising privacy concerns. If bar codes were used, 82 percent of poll respondents said that food companies should not be allowed to gather any data.

Consumer Reports supports mandatory GMO labeling because we believe everyone has the right to know what’s in the food they eat. If you agree, we encourage you to take a minute to call your senators to let them know.