#xkcd No. 2889
Date: 2024-2-2
Title: Greenhouse Effect
Alt text: Once he had the answer, Arrhenius complained to his friends that he'd "wasted over a full year" doing tedious calculations by hand about "so trifling a matter" as hypothetical CO2 concentrations in far-off eras (quoted in Crawford, 1997).
https://xkcd.com/2889/
#xkcd No. 2889 explanation: https://explainxkcd.com/wiki/index.php/2889