> Exactly which of the above will run out in the next 1000 years? Phosphorus. http://www.sciencedirect.com/science/article/pii/S095937800800099X http://www.sc

> Exactly which of the above will run out in the next 1000 years? Phosphorus. http://www.sciencedirect.com/science/article/pii/S095937800800099X http://www.sciencedirect.com/science/article/pii/S0959378008...