3 ms·
tl;dr - "The surprising answer to this question is that we breathe it out." O₂ in, CO₂ and H₂O out
by amitutk 11y ago
tl;dr - "The surprising answer to this question is that we breathe it out."
O₂ in, CO₂ and H₂O out
- whoopdedo 11y agoI had never thought about the question before, but now that I see it it's a "Watson" moment. My original guess would have been urine & feces.
- StavrosK 11y agoI'm proud to say that I got it right, after a brief "urine" moment, but I think it's only because I had watched the Veritasium segment about where trees come from, way back when.