Three years, a new Administration, and the stimulus bill have changed many aspects of the energy conundrum. Still, many of these technologies face the same technical and policy challenges that Barbara Bogaev outlined so clearly in this program in 2007.

"After Oil" is an excellent survey of petroleum substitute technologies, explained in sober and realistic terms. It will warrant an update when Congress passes its next energy legislation. That policy package will answer Barbara's question:

"We have the tools. But do we have the will? Do we have the determination?"