I'm for an annual injection. This isn't some pie in the sky stuff like deploying mirrors in space to reflect the Sun, it can be done.
And while we clamp down on the warming with the injections, we can still transition to clean energy, manufacturing, transportation, etc and eventually stop the aerosols.
People constantly act like this is a USA problem when we're only responsible for 10% of greenhouse gases.
We need to act now before sht goes off the rails. Can't wait for the rest of the world to do anything, because they're not.