What happens when there is no restoration?

[NorthernRaider]

Mary mother nature will deal with it, EG as listed in some books those who die at home will often become mummified if the seasons are warm and / or the heating is on. those who die outdoors will feed plagues of scavengers and vermin including rats, mice, crows, magpies, dogs, cats, foxes, badgers, this is superbly addressed in George R Stewarts classic EARTH ABIDES

The stink will be dreadful in places for months, plagues of maggots and flies, but eventually natures balance will restore itself. the knack is to live upwind of all the corpses.

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It is neither prudent, wise, practical or a good use of time for preppers to try and bury anyone except those close to themselves.