Even higher CO2 in the Ice Age

And our climate models did not forecast it, even though man-made carbon dioxide, the gas thought to be responsible for warming our planet, has continued to rise.

Don't mean to pile on here, but yes, our CO2 levels have been rising. They're currently at a whopping level of 360 ppm, which is higher than they've been for some time now. But if we go back a few years, say to the Ordovician Period, which was but a mere 450 million years ago, the CO2 levels then were at 4,000 ppm. Funny thing is, this was during a major ice age. So how on earth did CO2 levels get so high back then when there was no "man-made" warming. Let me guess, the climate models were all wrong.

Jeff Talbot

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