Energy Bulletin article with 2 great graphics:
[url=http://www.energybulletin.net/stories/2011-01-29/oil-and-food-prices]Oil and Food Prices graph[/url]
and a photo of a bull standing next to drums of oil – representing the number of barrels of oil it takes to bring him to market to become steak.
Twenty six (26) units of fossil fuel energy goes into producing one (1) unit of food energy in the form of beef.