| http://www.w3.org/ns/prov#value | - Take us for example, we???re around 20% carbon and the rest mainly water ??? we need carbon dioxide in large amounts to be able to breathe at all ??? every lungful of air has to contain an optimum 6% of carbon dioxide to efficiently transport oxygen through the blood, as well as for other processes ??? we certainly don???t get this from the atmosphere ??? we create it ourselves, out of our own pro
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