Clean power was on the rise in the U.S., even before President Obama’s carbon rules aimed to accelerate the trend

Jay OwenResource Efficiency

Kevin Smith has spent his career building power plants, but the billion-dollar Crescent Dunes complex he’s completing in the high desert halfway between Las Vegas and Reno, Nev., is no ordinary power plant. “This is the cold tank,” Smith says, pointing at a massive steel silo that will hold 70 …