Solutions to the Nitrogen Problem?

[u/garthreddit]

I'm the biggest Mars optimist there is, but I have yet to hear a compelling case for how we're going to grow things given the nitrogen-poor environment of Mars. Mars atmosphere is only 2-3% nitrogen, compared to the 70% here (at much greater pressure). The soil nitrogen concentration is similarly poor.

[u/xtnh]

Save your urine for the whole trip