Every step of the food chain rests entirely on oil and cheap energy
Peak Oil and Soil (Eric Andrews, August 1, 2007)

The “Green Revolution”, which ended the famines of the 70’s, could arguably be said to be a result of eating oil. The logical conclusion is that without cheap oil, we must again return to those times, except with 1/3 more population.

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"Anton Smedshaug's Definitive Guide To The Oil-Driven Food Crisis"
Gus Lubin, May 10, 2011