Stratospheric aerosol injection

But, you likely wouldn't want people to know exactly what you are doing either. But, I suppose people could say that their tethered balloon is a weather balloon for doing weather research and most people wouldn't understand what is really happening anyway.

Because this is what China and the U.S. and Russia and other nations are likely doing in secret to lessen the effects of global Warming much like Volcanic Eruptions naturally do too worldwide as well.