2GreenEnergy Speaking on Sustainability at Community Planet

Here’s a talk I gave in Santa Barbara to a meeting of a group called “Community Planet.” It’s a small group, but they’re enlightened people; I was impressed with their level of engagement. I covered the technological, economic, and political challenges that stand in the way of a sustainable future for humankind.
[youtube http://www.youtube.com/watch?v=8rVk3dPzjMU&w=640&h=360]