From the rollout of sexy new electric vehicles to technologies that convert turkey poop to electricity, green energy is the source of constant hype and buzz. What do green-energy experts have on their radar screen?

To find out, we checked in with Dan Kammen, director of the Renewable and Appropriate Energy Laboratory at the University of California at Berkeley; and Ron Pernick, co-founder and managing director of Clean Edge, a research firm with offices in Oregon and California.