I suppose this would of course become a real issue if we do keep expanding it does only seem logical to run out of space for human needs like this.
If we were to get to that point the only thing I can think is there would be some kind of law later put in to keep it in check and other means would be enforced. I mean you would to have to do something about it if indeed we ever reach a point where we do not even have enough land for burying the dead.
But I would imagine more the other way around first before dead people…...not enough room for living people wouldn’t you say? That I would hate to even imagine…..
Oh and yes another solution zombies! quickly get the T-virus!!! :)