re: #192 Decatur Deb

Carried to excess, use of the Earth for anything other than graves will become impossible. Europe is a grave. The main cemetery in Venice rents gravespace on 12-year leases because of crowding.
en.wikipedia.org

And therein lies an SF premise: Complications on the voyage of the Cóiste Bodhar , a funerary ship carrying remains to Earth from all the far-flung colonies.