Global warming is not an all or nothing thing. It's not like 'nature's doing it' OR 'humans are doing it'. It's more like a combo of the two. Maybe we can't do squat about wht nature does, but we should be able to amend our own behaviors and rein in the ones that contribute to the warming. IMO.

Also, a re-reading of this post makes it clear that I don't think humans are in the nature cycle anymore. Huh.