The debate over the safety of GMO versus non-GMO foods is heating up again.

GMO stands for genetically-modified organism. But groups like Greenpeace call it genetic pollution.

But, a new study released in Forbes magazine concluded that GMOs were not toxic.

Still, many shoppers, concerned over the safety of and long-term effects of consuming their food, have opted for non-GMO foods.

Experts say outlawing GMOs could lead to higher prices at the grocery store.