i had this in my instapaper favorites from my reading queue a few months back. with the recent santorumism in the news as of late, this popped back into my noggin.

or something like that.

warming arctic permafrost fuels climate change worries

the tl;dr summary - this stuff is hard. really, really hard, there are no easy answers and ones ability to make effective personal changes in their lifestyle has depressingly limited impact.