Washington Post: PRESIDENT BUSH announced in 2004 and then continually promoted a public-private venture he hoped would usher in an era of clean coal and be a cornerstone of U.S. efforts to address global warming. The FutureGen plant would have created electricity by stripping coal of harmful carbon dioxide and pumping the gas underground. The result would be power generation with zero greenhouse gas emissions. In December, Mattoon, Ill., was selected as the site for the coal plant. And then, on Jan. 30, …