If a gallon of gas ends up at $10 ten years from now, how much do you think people will complain about having to wait an hour to recharge their electric car? Not much I'm guessing.

http://en.wikipedia.org/wiki/Fertilizer#Inorganic_commercial...

Natural gas and petroleum are about as similar as the hydrocarbons of corn and cherries.

Coal, petroleum, and natural gas are three large categories of energy hydrocarbons. If gas is cheap relative to oil or coal, then at the margin, some users will shift to gas. Prices of energy hydrocarbons will be correlated, over the long term.

Then, as coal, oil, and gas are all depleted (with their own separate peaks, perhaps), their prices will increase. Foods like corn which have many dependencies on low-priced energy (farm equipment, fertilizer, drying, and transport), will come under increasing upward price pressure.

Corn is used in perhaps a quarter of food SKUs in American grocery stores, so won't a lot of food prices go up as energy prices go up, as a consequence of peak oil (or coal or gas)?

No one uses oil to generate any significant amount of electricity, most gas turbines are powered by natural gas, since it's cheap and plentiful. Gas turbines are only used to peak load not base load since coal is even cheaper than natural gas.

Most people spend more in fuel getting their groceries home than transporting them to the store. Food miles should be calculated by the distance to the grocery store from your home.