Biofuels bad or good

I just found a very interesting Q & A website on Biofuels. This shows some bad aspects of the production of biofuels and the efficiency of such fuels. This website is developed by Prof. Tad Patzek from UC Berkeley (currently the chairman at the department of petroleum engineering at U of Texas at Austin; number one petroleum school in the United States).

I have seen more evidences on inefficiency of the production and use of biofuels. I believe the solution is still responsibly use of fossil fuels:

Here are the links:

http://petroleum.berkeley.edu/patzek/BiofuelQA/Materials/QAarchive2007.htm

http://petroleum.berkeley.edu/patzek/BiofuelQA/qatop.htm