Geologic methane is seeping through the edges of thawing permafrost and receding glaciers in Alaska and Greenland, according to a study by researcher Katey Walter-Anthony of the University of Alaska, Fairbanks. In the past, researchers have found that, as permafrost thaws, previously frozen organic matter, such as dead plants or animals, decays and releases methane. "Now we are saying that, as permafrost thaws and glaciers retreat, it is going to let something out that has had a lid on it."
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