Seven years ago, David Sandalow pitched an idea that’s turned into one of the biggest international gatherings on clean energy. While an assistant secretary at the U.S. Department of Energy, Sandalow proposed to then-Energy Secretary Steven Chu an annual meeting of energy ministers from around the world to help accelerate the transition to clean energy technologies. The first Clean Energy Ministerial was held in Washington, D.C. in the summer of 2010. Recently, the seventh Clean Energy Ministerial took place in San Francisco.  Delegates from 23 governments and the European Union participated.  Sandalow, the Inaugural Fellow at the Center on Global Energy Policy, was in San Francisco and, not long after returning, joined Bill Loveless on the Columbia Energy Exchange podcast (Listen here).