Geoengineering:Changing the weather through science

Tweaking the climate to save it: Who decides?

The most natural way to change the weather would be to change it and mimic volcanoes. For example, in the above article at "tweaking" above mentions that the volcanic dust reduced worldwide temperatures from Mount Pinatubo eruption by .5 degrees worldwide. So, to me, mimicking volcano dust would be the easiest way to bring down temperatures. However, that is meaningless unless CO2 emissions worldwide can also be reduced simaltaneously.

And what if at some point a world calamity of some sort stops people from doing what is necessary to reduce temperatures and reduce CO2? Would the tampering once stopped soon render life as we know it now on earth extinct because of then quickly increased temperatures and CO2?

As for the "Who's going to decide question" I feel those nations that want better climates are already doing whatever it takes already in secret. Likely these are some of the biggest nations on earth who don't have to worry as much what smaller nations think.

For example, any nation could take plane near one of the poles with volcanic dust and trail a hose and release at any altitude fine volcanic dust. Who would even know if no one was there to see it? It wouldn't be the first time. And this would or already has changed the weather.

Later:  by a few days:

I was thinking that a modified Jet airplane refueler hose that trails behind  a fighter jet refueler that was converted for volcanic dust dispersal might be the most useful way to disperse volcanic pyroclastic glass dust into the upper atmosphere to reduce temperatures worldwide. However, reducing temperatures will also change the weather to some degree everywhere. How this all works out will be interesting.