midnight Target: Radioactive waste stays dangerous for up to 90,000 yrs IIRC in the case of Strontium. Where could you put something for that long and ensure that the seal will never be broken?
How does that help thousands of people who die/suffer now from harmfull effects of coal? If civilisation stays on course, the next hundred years will see a lot of change, let alone 90,000 years. Technological challenges faced by ancient egyptians are not that scary to us. If civilisation fails, who cares about some extra radiation?
The population that North America without civilisation could sustain is probably less than 10 million. They will find a lot of "clean" places outside the deserts where the waste is stored.
miko