I watched a documentary on the Tibet people and their sky burials. They chop up bodies and leave them for vultures. The choppers "prayed" before the chopping by taking hard liqour.

The explanations for the sky burials were: Firstly the land is mountainous and rocky, soil under which to bury the dead does not exist. Secondly, it is so cold and air so thin of oxygen that bodies do not decompose naturally.

https://www.google.com/a...Tibetan-sky-funeral.html

The kikuyu, maasai also did the same so that the body could go back to nature. The body was fed on by animals and recycled back into the ecosystem. I read Karen Blixen's "Out of Africa" book and she wrote that she wished she would also be left out in the open to be fed upon by vultures and hyenas and become part of nature.