Lets fund fracking activity around minor active volcanoes. I bet that an increase in volcanic explosions can come with short-term cooling effects.

Brilliant idea, I will fund it.

Great, we conduct artificial stratovolcanic eruptions in NorCal every month: https://makesunsets.com/products/join-the-next-balloon-launc...

I posted this as a joke. Turns out it is a serious? scientific field of inquiry.

[1] https://en.wikipedia.org/wiki/Stratospheric_aerosol_injectio...

[2] https://archive.is/r3lzO

[3] http://www.spice.ac.uk/