In his Oval Office speech on the BP disaster Tuesday night, President Obama was expected to call for action on legislation to move the nation away from fossil fuel dependence. But how close are we to having viable, cleaner alternatives? In California, utilities are struggling to meet the state's goal that they provide one-third of their power from renewable resources by 2020. The panel took a look at the most promising developments in the world of alternative energy -- and at some of the obstacles to large-scale adoption.
Dan Kammen participating in "Renewable Energy Policy, post-spill" panel