They do not take into account the many variables and
critical distinctions about food types and quality, and they do not take into account your individual body and how it works.
This is a very important
distinction, and one some proponents of AGW try to obscure, as to the extent they can confuse the status of their theories with classical greenhouse gas theory, they can divert attention away from the really
critical questions
about feedback, upon which AGW is based.