Trapped within the Arctic permafrost there's a whole lot of carbon - potentially 4x more than the combined amount of CO2 modern humans have emitted, and acceleration of the Arctic melting means as the ice goes, this carbon will be released.
A new study has shown that a melting Arctic may actually unleash far more carbon than even the worst-case models have predicted because microbes in the Arctic soil are digesting molecular iron manacles that would otherwise be shackling carbon to the soil - meaning we've underestimated the risk of it being released into the atmosphere.
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