Greenhouse Effect
What's the alt text? It should be illegal to post an xkcd without the 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).
/sigh
Once you accept that humanity is about 1/3 good, 1/3 apathetic, and 1/3 fucking evil, everything starts to make more sense.
The good humans have been dragging the apathetic ones out of the muck while the evil ones roll around in there and try to pull everyone back in.
Every indication I have seen is that it has always been thus.