[Pierre]

Originally Posted by downquark1

But how....?

That's for you to work out, I asked the question

---------- Post added at 11:38 ---------- Previous post was at 11:33 ----------

Originally Posted by heero_yuy

Reference

Looks a pretty close correlation to me.

I'd much rather have a graph that shows things a bit more clearly, that graph seems to use a faitr amount of extrapolation shown over a much larger scale thatn that of the graph on the left hand side. In order to shock.

Here is some info in plain english:

There has historically been much more CO2 in our atmosphere than exists today. For example, during the Jurassic Period (200 mya), average CO2 concentrations were about 1800 ppm or about 4.7 times higher than today. The highest concentrations of CO2 during all of the Paleozoic Era occurred during the Cambrian Period, nearly 7000 ppm -- about 18 times higher than today.

The Carboniferous Period and the Ordovician Period were the only geological periods during the Paleozoic Era when global temperatures were as low as they are today. To the consternation of global warming proponents, the Late Ordovician Period was also an Ice Age while at the same time CO2 concentrations then were nearly 12 times higher than today-- 4400 ppm. According to greenhouse theory, Earth should have been exceedingly hot. Instead, global temperatures were no warmer than today. Clearly, other factors besides atmospheric carbon influence earth temperatures and global warming

taken from

http://www.geocraft.com/WVFossils/Ca...s_climate.html

From a site that has no political or scientific agenda.