(1% of the world's energy goes into the manufacture of chemical fertilizer - Source here).
...Forget about how you’ll afford gas to put in your car to get to work as declining production, increasing demand, and the devaluation of the dollar push us towards $100/barrel oil. What needs to be understood is that peak oil likely means peak food. About 17% of US energy use goes into agriculture. The food in the grocery store that you buy traveled a long way to get to you, and it was probably grown with fossil-fuel intensive fertilizers and pesticides. As of 1994, it took 400 gallons of oil and equivalents to feed each US citizen, and that number has probably gone up.
