[sjastro]

Originally Posted by Archy

Thanks for the chart.
It shows, inter alia,

1. temperature over the recent past was not as high as 150 Ky ago.
2. however, CO2 levels have risen spectacularly.

This is as it should be, and a explained by Fred Hoyle: the relation between Co2 levels and temperature is logarithmic ie. it takes a very large increase in CO2 to induce a small increase in temperature

How did you come up with this conclusion?