Even as it faces increased regulatory scrutiny at home, America’s dirty and unwanted coal is being embraced in one of the world’s cleanest energy markets: the European Union. At the biggest power plant in the U.K., operated by Drax Group PLC, a small black mountain of a million tons of coal sits at the base of a dozen 374-foot cooling towers. Much of it is high-sulfur coal from under the plains of Illinois and Indiana—exactly the kind of high-emission, power-plant fuel receiving closer scrutiny from U.S. regulators and courts. Last week, the Supreme Court ruled in favor of enforcing regulations that require power plants in 28 states to cut coal emissions that blow across state lines. Many U.S. power plants were already reducing emissions in anticipation of tougher Environmental Protection Agency rules that take effect in 2015. Now, the Supreme Court ruling could affect 1,000 power plants in […]