Natural Resources committee  Absolutely, yes. I think certainly in the United States, certainly in most parts of the world, we've already gone beyond the threshold of what is desirable. Many people make the argument that these first-generation fuels are a good transition, create the foundation for a transition.

Natural Resources committee  Someone asked about carbon prices. Carbon prices are probably the best policy option, but most politicians are unwilling to do that, and that's why I advocate the low carbon fuel standard as a second-best approach to it that is fuel neutral and that uses tradeable credits so that you create market forces, stimulate innovation, and create a durable framework.

Natural Resources committee  Thank you very much. It's an honour to be with you, Mr. Chairman and committee. I'm a professor of engineering and environmental science and policy here at the University of California, Davis, and also director of our Institute of Transportation Studies. I've studied alternative fuels for 30 years.

Natural Resources committee  I can hear very well. Thank you.

Natural Resources committee  I am a little bit, and it's a little early in the morning here too.