Two hundred and fifty five years ago, on this day, March 21, 1768, French scientist Joseph Fourier was born. The amount of carbon dioxide in the air was roughly 280ishppm. As of 2023 it is 419ppm, but check here for daily measures.  The context was Why am I talking about some 18th 19th century French … Continue reading March 21, 1768 – Joseph Fourier born