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"Know" is doing a lot of work here.

> Almost all work to date on stratospheric sulfate injection has been limited to modeling and laboratory work.[1]

At best it seems like a good potential solution that need a lot more study.

[1] https://en.m.wikipedia.org/wiki/Stratospheric_aerosol_inject...

In chatting with someone in the oil industry, he said humanity was undergoing its largest accidental geo-engineering exercise via sulphur containing heavy oil being burnt on ships. Somewhat recently high sulphur content was banned from heavy oil and we stopped that experiment.

https://clearseas.org/en/blog/marine-fuels-what-is-heavy-fue...

For some reason, people really seem to hate it when the rain is sulphuric acid. Also, plants. The experiment ended because of the harms it caused.

We need not wonder. Nature has already given us a trial run.

All this brouhaha over unintended consequences are going to ultimately be secondary to the known and catastrophic consequences of runaway global warming.

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