McClatchy: Coal, the former king of American energy, is making a comeback after being left for dead in favor of cleaner-burning natural gas.
For years coal has been losing market share as the American fracking boom created a flood of cheap and abundant natural gas. But natural gas prices have edged upward, and the frigid winter created unprecedented energy demands. Power plants have increasingly been turning to coal as the solution.
There's serious doubt whether the resurgence in coal can last in America...