Nature World: A vast amount of carbon stored in Arctic permafrost is being converted into carbon dioxide (CO2) once it enters freshwater systems - a process that is worrying experts tracking climate change. This process was long thought to be enabled by microbial activity, but a new study identifies that sunlight itself might be the true culprit.
Traditional permafrost is frozen water trapped in soil in a region that never warms enough to the point that the ground will thaw. However, in the wake of a changing...