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TD says:
14 weeks ago

From wikipedia

"Urea is highly soluble in water and is, therefore, an efficient way for the human body to expel excess nitrogen. Due to extensive hydrogen bonding with water (up to six hydrogen bonds may form - two from the oxygen atom and one from each hydrogen), it is very soluble, and, thus, is also a good fertilizer."

Great so now we can finally have a car that runs on urine.

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