Tough new environmental rules and cheap energy prices are heightening the battle between coal miners and natural-gas pumpers over which fuel will dominate the U.S. power market. At the IHS CERAWeek global energy conference here, there were some heated words on both sides of the debate. “Cleaner coal, there’s no such thing,” Eldar Saetre, chief executive of the Norwegian oil giant Statoil ASA, told an audience of hundreds of people, most of them employed in the fossil-fuel industry. He added climate-conscious electric companies should burn natural gas instead. “The only thing that gets tense is when somebody like the head of Statoil makes a comment like there is no such thing as clean coal,” said Gregory Boyce, CEO of Peabody Energy Corp., one of the largest coal […]