I like that Canadian Scientist David Suzuki I think his name is. The effects of man's activity will hasten the event even if the event is a natural occurrence or not. That is if it normally would take 1000 years than maybe it will only take 200 due to the carbon emissions.

Now how anyone else can think in the big scheme of it all that reducing carbon emissions,   is a bad thing, then I don't get it because even if it does not cause global warming, it causes enough other problems in the environment and in our health that it is worth doing. So trying to reduce the fossil fuel emissions is a good thing I think and I applaud Gore for doing something other than sitting on his butt like so many others have been doing for decades.