> delivering 5 million tons of an albedo enhancing aerosol (sufficient to offset the expected warming over the next century) to an altitude of 20 to 30 km
... How much CO2 is that going to emit? Is that achieved by aircraft or rockets?
If you deliver it by aircraft, that's about 40000 flights per year (assuming you use Boeing 747-400 or comparable). That sounds like a lot, but right now there are 10000 aircraft in the air, adding 40k flights a year isn't going to throw the numbers off.
The bigger issue is that aerosol delays the "warming" issue, but doesn't stop ocean acidification (in addition to the issue of what happens if we ever stop for whatever reason)
How many MJ/tonne does that take? How many sites do you need? How many more nuclear plants does it take running continuously to manufacture and launch all this?
Who pays for this?
How do you persuade them?
How do you protect it from getting cut by the denialism faction as soon as they get elected?
... How much CO2 is that going to emit? Is that achieved by aircraft or rockets?