There is a movement called green burial - burying people the way it was always done before the funeral industry convinced us to spend $10,000+, mostly to blot out guilt feelings. Natural Burial, Wikipedia:
The body may be prepared without chemical preservatives or disinfectants such as embalming fluid that may destroy the microbial decomposers active in breaking 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 prohibits the body's contact with soil. The grave should be dug to a depth shallow enough to allow microbial activity similar to that found in composting.
You may argue that cemeteries waste land. But green burial cemeteries typically preserve land as open space.
I once had the honor of attending an American Indian burial. It was way up in the woods. No headstones. The deceased arrived in a plain wooden box in the back of a pickup truck. People got up and shared memories, sometimes in the native language. Then we had a potluck. It was an honor to attend.
I know that many paleo folks would say they want to be cremated and their ashes strewn someplace meaningful. That's fine. This is another option. Returning to the earth, in a preserved natural setting. Sounds good to me.
See also my blog article on hospice.