It's incredibly stupid and shortsighted to ignore obvious solutions and instead keep looking for shortcuts that could easily make things much worse, just to keep those profits up.
> [of sulfur-based radiation management] As of 2023, it is estimated that the cost of doing so would average out to a few billion dollars/euros per year.
This is in the range of "Possible for an eccentric billionare" to accomplish, right?
Or a single determined, mid-sized country?
... could it be scaled up and cool things down too far, say by an angry world leader?
I didn't realize the cost of it was only in the order of billions.
Dismissing SRM technology, Prof Joeri Rogelj of Imperial College, London, called it “irresponsible, dangerous and a threat to the manageability” of our survival, saying: “It is not a solution but an extremely dangerous band-aid that covers up the global warming problem without healing it, creating a false and unwarranted sense of climate safety while the core of the problem continues to fester.”
https://en.wikipedia.org/wiki/Snow_Piercer#Plot