Something that we used to hear about and no longer do is the finite-ness of crude oil. A number of years ago I had heard that 2 pockets of crude oil were found in Alaska and estimates have calculated that it is enough oil to fuel the US for something like the next 400+ years.
The reason I mention it is that, if true, it sort of negates part of the reason to be putting ethanol in gas. That reason being that ethanol is a renewable resource. I'd hope that in WAY less than 100 years (nevermind 400) that we'd have long since developed viable non-fossil fueled energy sources. In theory, ethanol is also cheaper than gas, but that's only if/when gas prices are inflated for the reason du jour.
As those alternate fuels become more wide-spread, in theory, the price of gas should come down based on supply and demand. Of course, as the demand goes down they also ramp down the supply, so it tends to keep the price of gas more even.

