A Dangerous 'Feedback Loop'

Scientists worry that the warming climate may trigger the release of vast amounts of carbon now stored naturally in forests and the ground. The released carbon would join man-made greenhouse gases, further warming the atmosphere and producing a ¿feedback loop,¿ which would release even more stored carbon and cause more heating. One promising technique would use the earth to store some man-made carbon dioxide by pumping it underground.

A Dangerous 'Feedback Loop'

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