I don't believe in global-warming, I feel, just like that witch, that if we all pretend it doesn't exist the problem will go away.
Uhhhh, I think the idea with the sun burning out being the cause of mankind's end isn't exactly plausible, in the five billion years it will take for the sun to die and if man is still here I can't imagine a picture where we don't have the technology to move to another system. Hell, give us a few hundred years and we will be able to do that.
As to the super-virus: Ever heard of nanobots? One of the official dooms day theories would be one of them going rouge and turning into a super-virus type thing...
As to a serious point on global warming: Modern solutions to a modern problem, changing our lifestyles would only slow down the problem because of the damage already in play, that and CO2 gases are naturally released. Given that animals release more CO2 then we do combined, it may be a naturally occurring phenomena from a newly evolved species! You can't just put the blame on man without the proper knowhow.
@Yukimora- Not even slightly, your just not aware how far and how much we will be able to do with future inventions and discoveries. Gene manipulation would get rid of our little fat problem, with the introduction of nanotechnology we will have the ability to create tiny bots to replace our immune system, wiping out all diseases.
I think it's possible for the new technologies to destroy us for other reasons, just not those.