> [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.