If buildings and roads need to be decontaminated, that could be accomplished by other relatively simple methods like wiping, power-washing or steam-cleaning, unless the cesium is deep.

Uses up a power of shirts, it does, till my missus is fair tired of washing of 'em.

One might wonder whether all of Hitachi's 900-odd units, which manufacture everything from washing machines to nuclear-power plants, would benefit from a similar separation.