Isn't there some company out there that will turn you into compost in a pot for a tree seedling?
I really want to start a green cemetery.
Body is buried either wrapped in a cotton cloth or in a simple wooden box with a small rfid tag. No embalming, no materials that don't decompose. This would be very friendly also to Jews, Muslims and granola grinders.
No headstones, the RF tag is for loved ones to find you if they want to visit your grave.
Graves are available as people die, so you may not be buried next to your spouse (or a spot is reserved next to you at time of death) RF Tags can assist with locating the available grave.
Planted in native prairie vegetation, sign at the entrance of who is buried there.
This is hard where I live, because in Iowa the body must be embalmed if not cremated or buries within 48 hours of death.