lets talk agriculture.
thats nitrogen, potassium, phosphorus
phosphorus is a rock. that means it comes outta the ground. that means it takes forever to replenish. basically a non renewable resource, like oil.
phosphorus prices have already been spiking in the last few years, and it is estimated that around 2020-2030 (hmm sound familiar?) we are going to just run out.
no more fertilizer.
the majority of modern agriculture relies so heavily on fertilizer that without it, well, it wouldn't just be tokyo facing a food crisis... we are talking the end of modern agriculture as we know it.
everyone talks about peak oil. oil is not crucial. not the way phosphorus is. there are new methods for making power being worked on every day. we still don't have any viable methods for replenishing the phosphorus, definitely not replenishing it to make up for the rate we use is.
check it out. google it. anyone have any ideas? i do biology. any chemists in the house?