Hey Evo, what are your thoughts on this whole scenario? seeing as your profession is a lot closer to understanding what's going on than mine, it would informative to get your opinion.
You can get a pretty good idea of my take on this whole issue by taking a peek in the Politics Forum (specifically, the thread devoted to climate change and environmental issues).
In short: there IS hyperbole being thrown around, but the exaggerations are, frankly, modest. Most of the criticisms of the science of climate change are unfounded and are quite transparently motivated by political bias, usually expressed most vocally by people with little to no actual scientific background.
What most people don't understand is that we don't exist in a vacuum.
Humans are extremely adaptable - we can tolerate a wide variety of temperatures and conditions. But the things that we eat, and the things that
they eat, etc.? Not so much. Bottom-up ecosystem effects can have
severe consequences, and this simply cannot be overstated.
Will we go extinct? I hardly think so. Will we able to support a global population of 7 billion + people under these shifting conditions? Certainly not. This means that there will be casualties. Human ingenuity will only take us so far.
The most interesting - and perhaps important - questions are these:
1) What mitigating steps can we take, and how much do they actually
matter (this was brought up earlier)?
and
2) Over what
timescales will these changes occur? As a biologist, particularly one interested in evolutionary processes, you learn rather quickly that this is a critical factor for determining whether lineages will be able to adapt and persist. The quicker the change, the more grim the outlook.
So, I guess the short answer is: it's not the end of the world or even the end of us, but it may be the end of life
as we know it - though you and I will probably be dead before the **** really hits the fan.