Higher prices -> more discovery: in last 10 yrs phosphate reserves 100 yrs -> 300 yrs (known resources to 1400 yrs) http://www.ipni.net/publication/bettercrops.nsf/0/C3AB0523A890EBC685257BD50055E09A/$FILE/BC3%202013%20-%20p18.pdf …
9:34 PM - 27 Feb 2016
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