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May 14, 2009 9:33 PM

8,000 feet under: In Kentucky, quest to bury CO2 is halfway

Beside a cow pasture, scientists are drilling through 8,000 feet of rock, hoping to learn how to forever lock away carbon dioxide, which threatens Earth's climate and our way of life. It's a science experiment that, if it works, would be carried out on a scale never before seen.

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