This is a facinating topic...IMO Biofuel can be developed poorly (ethanol from edible feedstock developed via an energy intensive process from corn) or wisely (from non-edible feedstock like grasses or wood (technology forthcoming) or
from high-sugar biomass or better yet Hemp)
Corn-based ethanol has waaaayyy to many problems if it uses edible feedstock and will totally ##### up the value-menu at Taco Bell