We have to be careful with Bio-fuels. Right now, the increase in price of corn and acceptance of biofuels is creating social and environmental disasters in many parts of the world.
Take for example a brazilian person growing corn or wheat to sell in the local markets; the high price of corn brought on by legislature to increase the use of biofuels in first world countries has caused this farmer to raise his prices and sell to the international markets. Now the corn is too expensive for locals....and they are starving.
On the environmental note.....when it is so economically rewarding to grow corn.....people clear rainforests to plant corn......a little bit counter productive dont you think?
especially since the clean burning properties of ethanol and other plant oil based products are very small.