"Saul Griffith, a materials scientist and inventor who is the chief executive of OtherLab, a San Francisco-based technology incubator that focusses on clean energy, agrees. In recent presentations, Griffith has sketched out an aggressive plan for switching to clean power and electrifying heating and transportation, which he says could be completed within twenty years. “It’s entirely reasonable to do it,” he said. “The United States is lucky because of its natural advantages. It’s a country with low population density, good wind, good solar, and good hydro resources. The only reason not to do it is political inertia and the influence of the existing fossil-fuel industry.”"