[tpaine]

Sure, co2 levels have been much higher in the distant past...
I don't say that doom is in the cards. I say that the changes in atmospheric co2 levels are more likely to result in severe unpleasantness than the opposite.

--- Your wiki graph shows a rise in co2 levels of 200 ppm in the last 200 years. Yet the 'distant past graph' shows a gradual decline in co2 levels over the last 500k years from much higher levels.
-- Your [& Gores] prediction that this 200 ppm rise will bring on "severe unpleasantness" is sheer speculation.

Gore's position is understandable, in a political sense. Your's is not.

[liberallarry]

Your wiki graph shows a rise in co2 levels of 200 ppm in the last 200 years.

True.

Yet the 'distant past graph' shows a gradual decline in co2 levels over the last 500k years from much higher levels.

No. The 'distant past graph' shows a decline from very high levels millions of years ago to a level significantly lower than now which fluctuated with ice-age cycles (the medium term graph I posted). The Wikipedia article also contains a version of the 'distant past graph' and an explanation of the processes presumed to be dominant in that time.

It's disturbing to find so few posters who think it necessary to read the article, preferring to read only stuff which supports their point of view.