The amount of calories we burn does not contribute to the net carbon excess per se; after all, we're part of the natural carbon cycle. The number that matters

The amount of calories we burn does not contribute to the net carbon excess per se; after all, we're part of the natural carbon cycle. The number that matters is the amount of energy used to acquire the calories we do consume. The carbon that matters is the amount desequestered as a result of burning fossil fuels.