Let me 'talk off the point'. It's about how 'man' isolates himself from natural system(s). We toilet and not return our wastes to the system (animals do); we germicide and deplete micro-organisms that are really the backbones of natural systems; we destroy forests and plants -- oxygen generators that let us breathe and live; ... even when we are dead we either go 6 feet under surface (out of useful range for plants and micro-organisms) or into ashes (and little urns -- again out of useful range for anything).
We really have to relook the ways we live and die. I say re-fashion, re-tradition,... relive and redie so that we are more of a part of Nature and return more usefulness to Nature.
Never the smell, the rot, the looks and the maggots - animals are useful all the way!