On the other side of this you have something like the Runit Dome, which is a nuclear test crater in the Pacific which they filed in with radioactive debris and

On the other side of this you have something like the Runit Dome, which is a nuclear test crater in the Pacific which they filed in with radioactive debris and covered in concrete. It is starting to leak from rising sea levels. But when people complain about this, they are told "oh, don't worry, there's actually far more radioactive material outside the dome" because it turns out they only managed to clean up about 1% of the contamination, and the rest of the immediate area is still covered in fallout.