A Pee Tree to harvest phosphorous for fertilizer?

While the cultural appropriateness of this concept might be debatable, the science isn’t. It’s a known fact that the high concentrations of nitrogen and phosphate found in urine can come in very handy in the production of (natural and organic) fertilizers. So why, then, do we dilute and flush it so quickly? Designer Joa Herrenknecht’s Pee Tree concept does 2 things: it provides a means to catch and use undiluted urine for greener purposes, and also makes public urination less of a taboo and more of a sustainable act (or at least that’s the goal!). While we may not see Pee Trees lining our sidewalks anytime soon, the idea is surely provocative.