Goodbye Yellow-5. Ciao trans fat. Sayonara unsustainable palm oil. "Today's customers want simplicity, transparency and choice in the foods they eat,"  proclaimed the Bell's broadsheet. And while it's great that fast food giants are listening to the public, there's one problem: In terms of describing food, "natural" is almost completely meaningless.

Online, a chorus of voices sing about natural foods, but with little harmony. It might mean antibiotic-free to some, while others target GMOs. Then there's the confusingly powerful cries for chemical-free foods (everything is chemicals, people). Even the FDA admits there's no satisfying answer. That wishy-washiness is a problem. OK sure, maybe nobody has a definition of natural, but we all kind of agree what it means. But what if that shared-ish definition changes? What if next year natural means my hamburger contains no robot parts?