Biofuels are said to be the answer to the world's energy needs, but others say they threaten fuel security. Do you think plants-to-energy has a role to play in keeping the world moving?
Updated: October 10, 2009, 12:00 AM
Biofuels are said to be the answer to the world's energy needs, but others say they threaten fuel security. Do you think plants-to-energy has a role to play in keeping the world moving?