Not one big enough to cause another great extinction, but small enough to just turn a whole small country and parts of neighboring ones into a huge crater. Will the people who was evacuated out after NASA stated a warning try to rebuild the country after everything has settled down or do they’d become citizens of another country?
Edit: after reading the comments, maybe turning a small country into a crater is too much, what about just level the place, or in any way that make it uninhabitable for a period of time?
Do you seriously think that once they’re taken out they’re gone forever? All’s we’ve done is make them easier to access by bringing them to the surface. Even the average landfill has a higher mineral content than most mines do, if anything it’ll be easier to get than when we dug it out the first time.
valid point - concentrations, sure - the boneyard will be fodder for decades of exploitation and archeology. Worldwide, I don’t know how much will end up accessible in the waste stream as so much is dumped into the seas.