I remember reading about the cooling effects of aerosols about a decade ago. It's not like this was a mystery even back then. See this article from 2013: http

I remember reading about the cooling effects of aerosols about a decade ago. It's not like this was a mystery even back then. See this article from 2013: https://news.mit.edu/2013/the-global-warming-conundrum-greenhouse-gases-vs-aerosols https://news.mit.edu/2013/the-global-warming-conundrum-green...