Guest: Brian Jennings.

The price of oil has driven the rise of ethanol as a potential alternative, but some still remain skeptical, questioning the environmental impact of ethanol production. Today on Focus we'll have the second of two programs looking at the pros and cons of ethanol with guest Brian Jennings, Executive Vice President of the American Coalition for Ethanol.

Guest: Joseph Romm.

In his State of the Union address last year, President Bush called for the development of hydrogen as an energy source. This morning on Focus we'll talk with former Department of Energy official Joseph Romm about whether hydrogen could be powering our world in the near future. Romm says he doubts that hydrogen-powered cars will become available anytime soon—but hydrogen fuel cells could power our homes and businesses. He'll also discuss his recent book, The Hype About Hydrogen.

Guest: Scott Barnett.

Many researchers believe that fuel cells will be the power sources of the future. They are more efficient than the internal combustion engine, have no moving parts, and produce almost no pollution. One day they may power our vehicles, our offices, and even our homes. This morning on Focus we're joined by Scott Barnett from Northwestern University to explore the basics of the fuel cell: how it works and some of its potential applications.