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Permafrost and the big melt
There's a carbon bomb waiting go to off way up north in the Arctic. It's lurking in frozen soil known as permafrost. Reporter Amy Martin of the Threshold podcast rides along with a group of Swedish researchers who are trying to help figure out what may lie ahead as the region warms and the permafrost thaws. Her report is part of our series, “The Big Melt: Life in the changing Arctic.”