>Farmland is only a limited resource if you are not using artificial fertilizer. Until the supply of phosphorous mass agriculture relies on for fertilizer runs

>Farmland is only a limited resource if you are not using artificial fertilizer. Until the supply of phosphorous mass agriculture relies on for fertilizer runs out. http://web.mit.edu/12.000/www/m2016/finalwebsite/solutions/phosphorus.html http://web.mit.edu/12.000/www/m2016/finalwebsite/solutions/p... Or as more and more arable land is lost to erosion https://www.worldwildlife.org/threats/soil-erosion-and-degradation https://www.worldwildlife.org/threats/soil-erosion-and-degra...