Sentences with phrase «cretaceous hot house»

The fact that the earth appears to have gone through huge changes in atmospheric CO2 concentration over geologic eras, while the estimated temps went from 12degC to 22 deg C regardless of «Snowball Earth» or «Cretaceous Hot House» with both hot and cold periods occurring during both high and low CO2 regimes and both with and without ice caps argues very strongly that we do not understand the climate mechanism at all.

You can't extrapolate linearly to 0 % greenhouse gases, and the fact the the planet has gone from Snowball Earth to Cretaceous Hot house should give no - one any comfort that climate sensitivity is negligible.