If one has access to a broadband connection be sure to have a look at these talks.
The page title link is to the entire topics of Google campus Tech Talks - with an emphasis on software, but covering many fascinating subject materials.
The talks liked below are those I have found so far that relate to clean technologies.
Biofuels: Think Outside The Barrel Vinod Khosla
Learn about Solar Energy and Solar Panel Installation...
Electricity use and efficiency of servers and data centers: A review of recen...
Geoengineering Earth's Climate
Should Google Go Nuclear? Clean, cheap, nuclear power...
Electricity from Orbit: The case for R & D
Windbelt Cheap Generator Alternative
My own solar system: Installing solar panels at my house
Climate Change and Health
Ocean Wave Energy
Tango EV Electric Sports Car
Fission is the new fire