This is the norm in Arab/Muslim countries where their doctrine instructs that the (naked) dead should be covered only in a simple, white cotton shroud and buried six feet under; caskets and embalming fluids are not used. (Hence the Islamic requirement for a speedy (same day if possible) burial, no wake, etc.)

In similar vein, mausoleums, raised tombstones, and cemetery shrines are also forbidden (the overall theme is "we are all equal in death").

The net result is that cemeteries are "reusable" and some of the most-popular in Saudi Arabia ("jannatul baqee'" a là Arlington Cemetery) are reused/recycled every so many decades (or is it once a century, once the denizens are forgotten/no longer visited?).