Parts of the Arctic tundra are now releasing more planet-warming gases than they absorb, an international study published Tuesday suggests, upending a millennia-old trend and raising concerns about a climate change feedback loop.

A new study suggests regions of the Arctic tundra are now releasing more planet-warming gases than they absorb, upending a millennia-old trend. The study published in academic journal Nature Climate Change suggests many tundra regions may have started to release more carbon dioxide than they absorb, calling it a “noteworthy shift in carbon dynamics.” The […]