It's not used as it has trade offs and poses risks. The guy confirms it.
Then you're fortunate to live in one of the few places where this isn't a daily occurance.
It was being discussed at length at a U.N Council as far back as 2006.
https://rumble.com/v4q7lsq-un-council-presentation-of-geo-engineering-weather-manipulation-2006.html
The British Met Office just recently put out a video, openly acknowledging 'Stratospheric Aerosol Injection'.
This topic is no longer a secret. Nor is it conspiracy...