A team of researchers from the University of Almeria, Spain, has calculated how much CO2 causes a human being by the act of eating, and the result is striking: 2 tons per person, mostly due to breathing and treatment of waste we produce.
Other factors contributing to the production of CO2 is, of course, agriculture, livestock, processing and distribution of food, cooking process and excretion of the same.
The study, of broader scope, has been studied, even the process of "eutrophication" which is the deposit of nutrients in the soil and water from excreta and materials (fertilizers, feed for livestock) end on the surface characteristics change dramatically.
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