[American in Israel]

Perma frost is a carbon sink? Who but a enviro wacko would have thunk that Hydrogen and oxygen solidifying would somehow adsorb carbon.

As for the Alaska forest, most trees are worthless, as the perma frost binds roots so the trees are stunted. Best way to grow a respectable tree is to melt the perma frost...

[EQAndyBuzz]

Obama’s solution. Give Alaska back to Russia. Problem solved.

[Ben Ficklin]

Here's the Wikipedia page on the permafrost carbon cycle

As for the trees, here is a map of the boreal forests