Bill Gates and Steven Chu Discuss Global Energy Challenges

At the ARPA-E 2012 summit recently held just outside Washington, DC, Bill Gates and DOE Secretary Steven Chu sat down and discussed the world's largest energy challenges in front of a large audience. Watch in the window on the right. This in-depth video, moderated by John Podesta, distills what could be called, "The Davos Consensus," the blueprint many countries and global corporations are now using to find energy solutions for the 21st century.

Are you a techno-optimist like Gates and Chu?

Photos: Gates, ARPA-E summit video; solar arrays, U.S. Air Force photo/Airman 1st Class Nadine Y. Barclay