It is only a matter of time before the gradual melting of the permafrost reaches a point of inflection without return, a state of accelerated and irreversible change, whose side effects could push other parts of the Arctic beyond its own inflection points. Quite possibly, we are ready to witness such a transformation in our lives: loss of the ice sheet, increased fire frequencies in the tundra and boreal forests, and complete loss of habitat for marine mammals.

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