Energy Independence and Ethanol

One day after his State of the Union address, President Bush was on the road pushing energy independence by way of alternative fuels. Ethanol production, which is already a booming industry, would be increased five times on the way to reducing consumption of gasoline by twenty percent in the next ten years.  Dozens of new, corn-based ethanol plans are coming on line in the farm states, and Wall Street sees a new gold rush. American voters also expect there's ethanol in their future, but there are plenty of not-so-hidden costs.  Will corn-based ethanol deplete the food supply? What about greenhouse gases from ethanol and other "alternatives" like oil shale and coal? Is conservation a better solution?  We're joined by pollsters, and energy experts and producers.