Peak Phosphorus Coming

http://www.foreignpolicy.com/articles/2010/04/20/peak_phosphorus A good article about Peak Phosphorus, Phosphorus is widely used in agriculture in fertilizers and it is estimated that it will run out in about 40 years with serious consequence on world food supply. Phosphate deposits are found in Morocco, China, South Africa, Jordan, and the United States, China having the lions share imposed a 135% tariff on export of the resource in 2008 which wiped out exports, the tariff was later lifted but it gave the world a taste of what was to come.