The answer seems to be "Yes! Immediately! In all sorts of terrible ways! We must act NOW!"
Maybe. I've created this blog because I believe that people are in danger of overstating the case. I don't deny we've got a problem, I just don't believe that we can be so specific about what it is, and what we can do about it.
I think we're ignoring a bigger and more immediate problem - Peak Oil. Peak Oil is where the oil begins to run out - where the price goes up and we go short. And the price goes on going up. I predict that we'll see $100/barrel by Christmas, and that will just be the start. At least if we can't afford to start our cars we won't be emitting any CO2!
What do you think about global warming and climate change? Is it the biggest threat to human civilisation, or "the biggest hoax ever perpetrated on the American people" ?