I looked up what "spraying the stratosphere" means, and I love the leading paragraph:

"The idea is simple: spray a bunch of particles into the stratosphere, and they will cool the planet by reflecting some of the Sun’s rays back into space."

Literally the plot of the Matrix.

Wait until spraying the stratosphere doesn't work as intended..

Probably. When shit starts really hitting the fan (i.e. bottom lines are being directly affected) it will be knee-jerk authorized. It's the only rapidly effective technologically feasible solution we have. The "theory" is that it isn't too environmentally damaging either, so there isn't much leverage to push back against it.

It's basically like benzo addiction for the entire Earth. You take it initially to band aid your ills. You get addicted to the fix it provides. The fix is so good that you accept the bad effects. You become dependent on it to the point where quitting becomes deadly.