Also, the permafrost contains lots of methane which is a much more effective (bad) greenhouse gas than carbon dioxide. https://en.wikipedia.org/wiki/Greenhouse

Also, the permafrost contains lots of methane which is a much more effective (bad) greenhouse gas than carbon dioxide. https://en.wikipedia.org/wiki/Greenhouse_gas#Global_warming_potential https://en.wikipedia.org/wiki/Greenhouse_gas#Global_warming_...