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New Arctic feedback: vicious peat circles

Researchers have discovered new hot spots for emissions of the greenhouse gas nitrous oxide: barren patches of peat dotted across northern tundra. And warming in the Arctic – just as it threatens to multiply emissions of carbon dioxide and methane from thawing permafrost and drying bogs – could accelerate the output of this lesser-known climate change culprit, according to a study in Nature Geoscience this week (subscription). 

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