Researchers at the Department's BioEnergy Science Center who have achieved yet another advance in the drive toward next generation biofuels: using bacteria to convert plant matter directly into isobutanol, which can be burned in regular car engines with a heat value higher than ethanol and similar to gasoline. http://apps1.eere.energy.gov/news/progress_alerts.cfm/pa_id=497 We're not talking corn to ethanol here. The goal is that any type of cellulose (plant) source could be used. Switchgrass, which has little nutritional potential, is a likely candidate although just about any cellulose source could be used (sawdust, waste paper, etc.). To put things into perspective, almost two thirds (by weight) of what weâ€™re now putting in landfills is cellulose-based material that might be converted to motor fuels: â€¢ 28% paper â€¢ 28% yard and food waste â€¢ 7% wood If you Combine biofuels with renewable energy from the grid in a hybrid car like the Chevy Volt youâ€™re headed in the right direction, IMHO. Of course, firewood is fair game for conversion to fuel also.