Image credit: AgCert Peak oil is a subject that has gained much traction (even inspiring some sexy if pessimistic dancing from Oily Cassandra). After all, it's hard to ignore the fact that our dependence on oil and other fossil fuels leaves us vulnerable to supply shortages or sudden price hikes. But it's less well known that we may face a simultaneous, and equally troubling shortage of another key resource—phosphorous. ...Read the full story on TreeHugger