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<p>[QUOTE="Ownedbybear, post: 937859, member: 29"]Ah, but even that food carbon was once in the air! This is actually what's so fascinating about eco systems: closed cycle theory. It's not the origin that matters, it's the concentration. </p><p><br /></p><p>And, in fact, your exhalations are a product of what you eat. You inhale O2, exhale CO2, the carbon of which has come from what you eat, being a metabolic product. Bit of a simplistic explanation of the cycle, but you get my drift.[/QUOTE]</p><p><br /></p>
[QUOTE="Ownedbybear, post: 937859, member: 29"]Ah, but even that food carbon was once in the air! This is actually what's so fascinating about eco systems: closed cycle theory. It's not the origin that matters, it's the concentration. And, in fact, your exhalations are a product of what you eat. You inhale O2, exhale CO2, the carbon of which has come from what you eat, being a metabolic product. Bit of a simplistic explanation of the cycle, but you get my drift.[/QUOTE]
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