The history is here: https://en.wikipedia.org/wiki/Global_dimming https://en.wikipedia.org/wiki/Global_dimming Most of the dimming effect was from massively p

The history is here: https://en.wikipedia.org/wiki/Global_dimming https://en.wikipedia.org/wiki/Global_dimming Most of the dimming effect was from massively polluting coal burning. I'm sure you understand why we had to stop that. CO2 accumulates in the atmosphere and stays there for thousands of years.. This sulfur that causes dimming stays for a year or two.