GREEN
03/18/2010 05:12 am ET Updated May 25, 2011

Peat: A Climate Threat, Rising From The Soil

Peat, formed over thousands of years from decomposed trees, grass and scrub, contains gigantic quantities of carbon dioxide, which used to stay locked in the ground. It is now drying and disintegrating, as once-soggy swamps are shorn of trees and drained by canals, and when it burns, carbon dioxide gushes into the atmosphere.

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