Ah yes, the infamous human instinct when we see a problem, "What can we do about it?"
Lets break it down:
Global warming is a natural cycle the earth goes through..?.. perhaps. It would make sense that the earth may go through periods of extreme cold to stable to extreme hot then back to extreme cold. Of course by "periods" I am referring to millions of years. This would in turn replenish the earth's resources and keep it alive - whether or not we survive - I don't think the earth really cares. Maybe once an ice age occurs after the extreme heat kills off everything, once the ice age ends a new generation of completely different life forms will evolve and take better care of the planet. It is possible the earth is going through these cycles to find a stable planet of life that can live off of it's resources without totally pillaging it. "A mind of it's own" sort of idea.
Here is the kicker:
We don't know.
However, like Praxius explained.. everything can be explained with time. We clearly don't have enough data to come to a conclusion on this issue, and the media putting everyone into Armageddon panic mode doesn't really motivate anyone to stop and think - but more like freak out and drop everything they're doing. I hear a lot of "within 50 -100 years" we're all gonna die off due to global warming... pfff. Come on people, we're an extremely young life form.. we're not that close to edge yet. I say we have at least 500-1000 years to continue our current activity without a doomsday. However, in that time we will have used our science to come up with a conclusion and a solution.
I'm not a scientist, or even smart for that matter... I am just here for the ride - but if someone can give me a definite answer to whats really going on, I'll make the necessary adjustments to my life to be proactive against global warming. Sadly, I think with the priority-confused leaders we have running all the countries we're not going to get that answer for a very long time. Oh well - enjoy your short moment on earth called life and don't fear the end that someone only "thinks" is nearing. Oh and listen to lots of music..

Got meh global warmin' shades on... bring it.