Follow
#til that [Eunice Newton Foote](https://en.wikipedia.org/wiki/Eunice_Newton_Foote) presented a theory on CO2 increasing the atmosphere's temperature in **1856**!
She speculated that an increased amount of CO2 in some point in history would cause higher temperatures, long before the greenhouse effect was studied.
Of course, she didn't receive appropriate praise for her research, because she was... a woman. 😶
Note, though, that Fourier proposed the existence of the greenhouse effect (that's its modern name) in 1824.