yes, that's exactly the point. injecting tens of millions of tons of nanoparticulate in the atmosphere while studying the impact is how research is done. you could say it's a "study", it is -- but not from or for a public health interest. the "research" is not being done under any regulatory agency or law.

you can read from the US House of Representatives hearings on Geoengineering from 2009-2010 , there's plenty of discussion on geoengineering being somewhat outside the scope of governmental agencies.

here David Keith says: "there could be something terrible we find tomorrow that we haven't look at"