2011... 2013... Somewhere in that general ballpark, anyway. Either way, I agree, we'll all be dead soon, so no sense worrying about. Generally, I don't buy into those apocolypse theories, but I gotta give the Mayans some credit, they do know a thing or two about being wiped out.
*ahem* Anyway, my thoughts on global warming - firstly, assuming we do survive the upcoming end of the world, since we really don't know either way, it seems to me that the reasonable approach is to not take chances and cut down on our freakin' air pollution. Besides, I think we can all appreciate cleaner air even if it isn't a life-or-death situation. No one enjoys choking on car exhaust and factory smoke and smog and such.
Secondly, we have to think about our fossil fuel reserves. Now as for coal, okay, that might be around for a while, so I guess we can continue nasty coal-burning for electricity, but it's really looking that at the rate we're going, oil's gonna become economically unviable pretty darn soon (well, in a matter of decades, anyway). Let's face it, we are gonna have to come to terms with the fact that we can't just keep relying on oil forever. Something's gotta give, and I think from a stability point of view, it'd make much more sense to go ahead and switch to other energy sources now, while it isn't a necessity, so that we can make a smooth transition. Plus, there's the whole thing with the Middle East to consider.
Finally - yes, the Earth's climate does change naturally. Things go in phases. I am perfectly willing to admit that things can change drastically without us even lifting a finger. However, look at the potential causes of these changes - I say potential, because the fact of the matter is, there are so many different variables that affect the Earth's climate that it's incredibly difficult to pinpoint which one or ones were responsible for various changes. We are looking at an incredibly complex, dynamic system where, wherein there are a multitude of variables that affect not just the final outcome, but they affect each other, as well. To an extent, sure, the climate can be self-regulating, but then again, sometimes the climate can fluctuate wildly. In the end, yeah, maybe you can argue that Man's influence on the environment is only a small nudge (though I might disagree with that - it seems nearly impossible to see anything that hasn't been in some way influenced by our presence on this planet). However, because of the nature of the Earth's climate, a small nudge could easily set in motion a cascade of events that leads to a major climate change.
I apologize - this ended up being more of an essay than I had intended. Just, there were a few points that I felt had to be brought up.