Originally Posted by N2264J

This is just one of the many feedback systems that is so troubling.

Depending on what article you read, methane is 20 to 25 times more efficient at trapping heat than carbon. As the environment warms, the permafrost is melted releasing more methane which warms the environment further melting more permafrost, etcetera.

If you haven't watched the "How it all Ends" series I linked to eariler, the gradual change in climate we used to believe would take place over hundreds of years isn't the concern. It is the cataclysmic and sudden shift from feedback loops becoming their own self sustaining engine that will get us.