Introduction
An important new paper published on December 7th 2023 presents the results of an unprecedented in-depth review of all existing datasets regarding past CO2 levels. The paper was accompanied by a press-release, written by Columbia Climate School s Kevin Krajick and reproduced in full below. In particular, the work provides a more detailed picture of probable conditions here on Earth, centuries to millennia into the future, as the planet responds to CO2 levels not seen for 14 million years. Now, over to Kevin.