[legitster]

The idea that a billionaire is just going to yeet a program together is pretty far fetched. Even at "only" $20 billion dollars a year, there are less than a dozen billionaires in the world with that kind of free capital. And none of them could sustain that kind of spend for more than 1-2 years.

The "country of no choice" similarly applies to only a small handful of countries that have no decent way of mitigating climate change but also have the funds and resources to do SRM. So really, just China (which has already shown enthusiasm towards geoengineering) or India.

The primary human response is still going to be crop adaptation and mass economic migration. I think we are going to have to see a lot more of this before we see someone dim the sun.