*British

As interesting as Sir Attenborough is, the preponderance of evidence still suggests a mass extinction, circa 65 million years ago. Just read about the K-T boundary if you don't believe me.

Also they got the end of the Permian wrong, it ended 251 million years ago in the greatest mass extinction of all time.

i wouldnt be so sure choggie.
you have to keep in mind that all animals on this planet including us have had a perfect chain of offspring for 3.5 billion years. throughout, mass extinctions have happened just a handful of times. it's unlikely a super-massive extinction is going to happen by natural causes in a few thousand years that we've been building our civilisations...
regardless of whether the CO2 we've been pumping out will cause global changes we'd be stupid not to cut back because fossil fuel usage has really gotten out of hand (it's a very wasteful and primitive energy source anyway).
al gore probably lies, he's a politician. but who cares what their agenda is, it doesnt detract from the fact that we need to stop shitting on our own planet