On this day, September 20, 1893, Charles Duryea and his brother Frank road-test the first American-made gasoline-powered automobile.
On this day the PPM was 295ppm
Now it is 420ish – but see here for the latest.
Why this matters.
What a potentially useful invention. What a catastrophe it has turned out to be. Oh well
What happened next?
Vroom vroom! The car took over the world, reshaped cities, killed millions upon millions and, of course, polluted the atmosphere.