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Originally Posted by Spexxvet
Well, we eat or wear the other stuff we grow. Is there that great a difference?
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Absolutely, it's the difference between a chemical change and a physical one. Eventually, your poop does make its way back to the ground. And that cotton shirt eventually goes in a landfill and degrades back into the ecosystem. But burned stuff is different; you can't unburn it, at least not without putting back in a whole lot of energy. At least as much energy as you released when you burned it in the first place...