Carbon Free Food Sources

The Sugar cane on the left is from Florida USA. It is produced by a company called Domino Sugar.
The cattle on the right are from Australia.

According to the producer of the sugar cane - Domino: (Link)
Sugar is a naturally sweet product from our earth, so it's natural for us to want to be good stewards of our environment. We have a head start at this, in fact, because the sugar cane plant converts sunlight to energy more efficiently than any other major crop.
As a result of this, and the various earth friendly farming techniques and energy producing efforts at our Florida facility, specially marked packages of Domino® Sugar have been certified CarbonFree®

As Soylent Green writes:
And, if we make our carbohydrates carbon-free, we have what…?
Water!   That’s right, water.

By Domino's logic, the Australian cattle on the right are also carbon free. Refer this study by Dr Gerrit van der Lingen; (link)
According to MAF, 98.7% of agricultural methane comes from ruminant enteric fermentation, released by burping; and is part of a natural closed loop that has nothing to do with fossil sequestered carbon.

h/t Bill Pounder, Steve Goddard and Marc Morano.