[duahncjak]

This paper estimates the cost at ~$2.25B/year, and notes that more than 50 countries have military budgets exceeding $3B: https://iopscience.iop.org/article/10.1088/1748-9326/aae98d#...

They point out the plan assumes you can launch planes from a few different points around the globe. You don’t need global agreement, but at least access to some foreign airports.

[chillacy]

The scary part is how to resolve disputes over geoengineering. What if China decides to make the Gobi desert farmland but downwind it makes California the new Sahara desert?

[0xffff2]

>This paper estimates the cost at ~$2.25B/year, and notes that more than 50 countries have military budgets exceeding $3B

An utterly meaningless comparison. None of those countries are going to simply stop spending all of their money on their military overnight.