Bloomberg: In “Hot, Flat and Crowded,” Thomas L. Friedman steps onto a U.S. military base in Iraq and meets two soldiers who manage convoys of diesel-fuel trucks, those wide targets for insurgents and roadside bombs. They’re eager to curtail convoys by powering generators with solar panels and wind turbines. “Keeping people off the roads is the most important thing we can do,” Sergeant Major Mike Wevodau tells Friedman. “Why can’t we have solar and wind out here? I see them every time I …