At the current growth rate, global energy demand will double in 18 years. Meanwhile, governments are instituting mandates and offering subsidies to speed the move to an all renewable energy future. Nineteen U.S. states have released goals for achieving 100 percent renewable power in the next 20–50 years. While the promise of “clean energy” is appealing, will intermittent sources of energy be able to meet global needs? Join Dave Whitehead as he explores this important topic with author Robert Bryce.