Short Story

In the future, the world will be one big cemetery.  The earth's population continues to grow, and so do our cemeteries.  There is a finite amount of space on earth, and more of it is becoming occupied by dead people and landfills.  Our trash won't just go away, and our people won't stop dying.
Morbid or not, just think about it.  We keep using, not reusing. Eventually it will become too much and the world will be one big graveyard.