American Electric Power's (AEP) Mountaineer coal power plant in New Haven, West Virginia, October 30, 2009. In cooperation with AEP, the French company Alstom unveiled the world's largest carbon capture facility at a coal plant, so called 'clean coal,' which will store around 100,000 metric tonnes of carbon dioxide a year 2.1 kilometers (7,200 feet) underground. National Journal

A new study indicates that the number of projects to use clean-coal technology on a widespread, commercial scale has declined in the past year, according to The New York Times.

The survey, conducted by the Global CCS Institute, looked at large-scale carbon capture and sequestration projects worldwide and found that that the number of sites using the clean-coal technology had declined from 75 to 65 since the time the previous year's report was concluded.

"While CCS projects are progressing, the pace is well below the level required for CCS to make a substantial contribution to climate change mitigation," the study said.

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