Touted as the power plant of tomorrow, FutureGen involves technology that converts coal into highly enriched hydrogen gas that burns cleaner than coal. Plans call for the 275-megawatt plant to capture most of its emissions of carbon dioxide _ a "greenhouse" gas widely blamed for global warming _ and inject them permanently into underground reservoirs, a process called sequestration.
A FutureGen alliance made up of a handful of coal and electric companies, including St. Louis-based Peabody Energy Corp., has committed more than $250 million to the project. The U.S. government is putting up about $700 million.

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