It's quite cost effective to do something like: https://en.wikipedia.org/wiki/Stratospheric_aerosol_injection https://en.wikipedia.org/wiki/Stratospheric_aeroso

It's quite cost effective to do something like: https://en.wikipedia.org/wiki/Stratospheric_aerosol_injection https://en.wikipedia.org/wiki/Stratospheric_aerosol_injectio... Or https://en.wikipedia.org/wiki/Marine_cloud_brightening https://en.wikipedia.org/wiki/Marine_cloud_brightening