Jonathan Overpeck is a professor at the University of Arizona and was a lead author for the U.N.’s Intergovernmental Panel on Climate Change. Overpeck has also proven himself to be comfortably aboard on the Al Gore climate change bandwagon.

Yesterday, Overpeck wrote a tweet wondering what Lincoln would do about climate change, which is apparently a lot like slavery or something:

We can hear it already: “Gore score and seven degrees ago…”