There's a natural process to it, sure. That isn't to say we haven't done anything to screw ourselves royally. Whatever happened to worrying about the ozone and running out of natural resources? Now there's a real issue that should probably be addressed before scientists try to 'correct' the earth's axis shifting or anything stupid like that.
'Global' warming seems to be the wrong term to use, though. It's not the entire world that's going up in flames. Some parts are going to end up in a new ice age, too. Up here in Canada City it's getting colder every year, with longer winters. Every time I go outside, I wonder to myself how I survived the weather last year, or the year before. I'm getting nostalgiac for the years I was able to actually enjoy being out in the snow. Nowadays you'll get frostbitten if you're out there for five minutes.
I don't see anything as drastic as in "The Day After Tomorrow". Hopefully we can predict these changes and get out of the way before we're run over by a glacier. We've gotta be smarter than the last species to get wiped out by a climate change, right?