From the TED conference. The investment advice begins at 15:40. Click at about the halfway point on the control toggle.
Companies shown in the slide show:
Bloom Energy (solid oxide fuel cells)
Mascoma (cellulosic biofuels)
GreatPoint Energy (catalytic gasification)
Miasole (solar cells)
Ausra (utility scale solar panels)
GEM (battery operated cars)
Smart (electric cars)
AltaRock Energy (geothermal power).