በፐርማፍሮስት ውስጥ በሺዎች ለሚቆጠሩ ዓመታት ተይዞ ካርበን እየተለቀቀ እና ወደ ከባቢ አየር እየገባ ነው.
Ancient carbon, locked away in Arctic permafrost for thousands of years, could transformed into carbon dioxide and released into the atmosphere by warmth.