Other sources of energy are getting way too much play. Ethanol is incredibly resource intensive to produce when you think of the costs of planting corn, fertilizers (and pesticides), harvesting, transporting to fermentation center, fermentation, transport to fuel depots, etc. I think the problem might be that there are no lobbyists clamoring for other sources such as geothermal -- it is essentially free energy once you place the low-maintenance loop in the ground, so no fuel suppliers stand to benefit (i.e. ethanol). Although initially expensive, this cost could be lowered in new housing developments and wrapped into "Energy for America" green mortgages tacked onto existing mortgages. The beauty of this is that this mortgage is paid back by saving fuel every year. What's the biggest energy user in the country? It's not automobile use, it's building heating and cooling. Remarkably, geothermal addresses both of these. It has the potential to reduce our dependency on oil sources in authoritarian countries.