melting of permafrost means that _____ of ___ ___ ___ will restart, and this will be _____ decomposition as soil is ____ ____ and ____ ____, this will lead to the release of the ___ ___, ____ which is a much more _____ greenhouse gas and absorbs __ times more heat than ___ ____?
decomposition, dead organic matter, anaerobic, water logged, oxygen poor, carbon compound, methane, potent, 20, carbon dioxide