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Natural burial is the interment of the body of a dead person in the soil in a manner that does not inhibit decomposition but allows the body to be naturally recycled. It is an alternative to other contemporary Western burial methods and funerary customs.
The body may be prepared without chemical preservatives or disinfectants such as embalming fluid, which might destroy the microbial decomposers that break the body down. It may be buried in a biodegradable coffin, casket, or shroud. The grave does not use a burial vault or outer burial container that would prevent the body's contact with soil. The grave should be shallow enough to allow microbial activity similar to that found in composting. Natural burials can take place both on private land and in any cemetery that will accommodate the vault-free technique.
While all natural burials seek to prevent environmental damage done by conventional techniques, some go a step further by using burial fees to acquire land to restore native habitat and save endangered species. Such land management techniques are called "conservation burials". In addition to restoration ecology, and habitat conservation projects, others have proposed alternative natural uses of the land such as sustainable agriculture and permaculture, to maintain the burial area in perpetuity. Landscaping methods may accelerate or slow down the decomposition rate of bodies, depending on the soil system. Natural burials also do not use any machinery or heavy equipment for digging the grave site. Instead, the grave sites are dug by hand.
The first official conservation burial was established in the United States; however, natural burial grounds have been used previously in UK and the practice matches the methods used in many ancient and indigenous cultures.