However, common sense would dictate that the possibility certainly exists through the man-made release of carbon sequestered for millions of years.

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Once the energy trapped in coal is unleashed and its carbon sequestered, energy-laden hydrogen can be used directly in fuel cells.

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Underground storage of the captured carbon would be regulated in the same way that carbon dioxide sequestered from power stations might be again, for the most part, a local matter.

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The agency also claims the new scheme will at least double the amount of carbon dioxide sequestered, compared with FutureGen, and that the new plants will be operating by 2015.

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In addition to increased yields of beef per acre, the Grasslands model also creates an opportunity to commoditize sequestered carbon for carbon credit trading.

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Currently, the carbon byproduct is released into the air, but there is the possibility of it being sequestered, which technology oil majors like Royal Dutch Shell and Exxon Mobil are exploring.

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