Huh?

“someone born in the US”

You spin the turbine, duh

Mercury will always be with us. Arsenic will always be with us. PFAS will always be with us. Natural radiation will always be with us. Fortunately, nuclear waste is easily detectable, the regulations around it are much stronger, the amount of HLW is miniscule and the storage processes are incredibly advanced

Moreover, most Nuclear waste won’t always be with us. A lot of fission prodcuts have half lives in the decades or centuries

The land’s not the problem though. Sustainable development is, and larger populations inevitably contribute to global warming, waste etc. The fact that cities only account for a small portion of land doesn’t change anything. They will continue to exist and are only manageable if the population is controlled