While the goal is in place, Leahy says execution may not be as simple. A universally accepted and easily understood measure of carbon footprints needs to be found. Leahy says he's looking at the product's complete lifecycle, including production, distribution and consumption.
"It's a complicated task, but the goal is simple. I want us to come up with a clear system of labeling so that in future customers will be able to compare a product's carbon footprint just as easily as they can currently compare its price or nutritional value," said Leahy.
One concern is "fair miles" versus "air miles," noting many poor areas receive their food via airplanes. Simply scrapping all air miles would be unfair.