@sundogplanets @oldguycrusty 20 billion per year seems belony to me.

Nobody really wants #sai but when impact #climatechange becomes devastating it might become our last resort. My blog describes how SAI can cool the earth in 2 years and keep temperature steady even if CO2 keeps rising. We still need to slash CO2, but slower and avoiding collapse
Risks are big, but I have summed them up realistically without all the doom and gloom.
Its last resort time

Please read before you disagree
And sorry, its very long and thorough

https://econrevolt.com/posts/2023/10/stratinj2/