This is a problem because the warming heats up the frozen ground around the Arctic Ocean, where there is a massive amount of frozen carbon which, when it thaws, is turned into methane by microbes.
Aceasta este o problema deoarece incalzirea provoaca dezghetul pamantului din jurul oceanului artictic. unde se gaseste o cantitate masiva de carbon inghetat care, cand se dezgheata, este transformat in metan de catre micro-organisme.