Okay, here is an idea. Let’s say that this theory is true and we actually made the Earth hotter by removing sulfate aerosols from the atmosphere. Since sulfate aerosols are not something we want to breathe, we don’t want to put them back in the atmosphere. But why did the aerosols cool the planet?
Sulfate aerosols, while pollutants themselves and unhealthy to breathe, have an atmospheric cooling effect, as the particles are white and highly reflective. The sun’s energy bounces off of them, rather than heating the atmosphere and the Earth’s surface.
So, basically, all we need is a bunch of confetti cannons. We shred a bunch of shiny silver paper and fire it into the upper atmosphere. And then we are going to need some really big fans to keep it up there since we can’t turn the Earth over and shake it like a snow globe.
Or, you know, maybe scientists can find something lighter than air, that’s reflective and that we don’t mind breathing.
