Patrick Deneen has another really good post, this time on the impact of the rising cost of oil on the cost of food. It is really worth reading here.
A friend of mine who farms nearby talks about the costs of eating iceberg lettuce off season. He factors in the cost of the pesticides, the fertilizers, the water, and then the oil to truck it here in refrigerator trucks. He concludes that it is extremely expensive to eat something that doesn't even have nutritional value. Here is good reason to eat frozen and canned local produce.