As long as the animal kingdom exists, we’ll have a steady supply of digestive byproducts, whether you call it dung, manure, sewage, feces, or poop. We may as well use it for something! Oh sure, you know about fertilizer, but there are plenty of other ways we reuse “biological waste”. Read about camel apples, guano mines, and recycled coffee in
this article I wrote for mental floss.
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