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They don't embalm the body with chemicals either, so the body has to be buried quickly. This means the funeral can't be open casket - just as well if the casket reminds people of the Trondheim collection. In fact, if it's difficult to assemble people in a timely fashion, the funeral will likely have to take place after the burial. Personally I've never been thrilled with open-casket funerals anyway. The dead body is not the same as the person I knew. It's just a bag of bones. But for some people that will be the stopper.
Another potential stopper is the lack of any markers. There are no tombstones in green cemeteries, only wildflowers. They advertise that people can come to visit the meadow, instead of the one little plot of ground. In Britain they allow a tree to be buried on the actual plot to mark it, but that will be a problem if this takes off. Your tree of choice likely can't be contained to a three by six area. My mother was cremated, which is not at all eco-friendly, but it did allow me to keep her ashes under a tree at home.
But if markers aren't an issue, and not having a casket at the funeral is acceptable, then it seems a reasonable choice.
ETA - It was very unfortunate timing that I posted this shortly before we lost a student at our school. I'll keep it up because I do think how we embalm and bury our dead under a layer of cement is an important environmental issue to address, but I'll post more so it's not the first thing that comes up on the screen, although the tragedy has left me too distracted to write much lately.
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