The idea of turning food, or even using land that can produce food, into a direct fuel source, defies logic. Especially when world food prices are rising; starvation and malnutrition are on the rise world-wide; and food prices soar.
The combustion age is dead, be it powered by so called bio-fuels or fossil fuels. No combustion technology is without environmental impact. The focus should be on more efficient and affordable solar and nuclear technologies, distributed power generation.
Wind and Wave are dead ends as well (due to the immediate impact on climate they will cause by removing energy from the planets climate engine and the changes they would cause in world weather patterns.)
Efficient rooftop solar, combined with next generation batteries and capacitors, all networked into the current power distribution systems, backed by nuclear, would provide the most resilient system.
For transportation, plug-in electrics (also using current state of the art batteries, motors, and capacitors) rather than the current hybrid dead ends, which typically have average fuel economies that are no better than well designed fossil fuel only vehicals in the same size range, and usually worse than the newer state of the art diesal engines.