I would not go that far in characterizing it thus,
>>5-kun. After all it takes significant energy to cremate a Human body. If you want to be "environmentally friendly" you should perfoarm the folloaing:
1.
Air burial. You prepare the coarpse foar uptake by predatoary birds, then lesser scavengers, ideally on oapen plateaus far from common passage of Humans (since oapen presentation of scavenged coarpes is emoationally upsetting and alsoa a health hazard). After live scavengers have reduced the coarpse to moastly boans, then the boans are ground up manually with remnant flesh to foarm a mineral-rich paste that is alsoa set out for birds and lesser scavengers to complete consumption.
2.
Earthen burial. This is a complete foarm of dispoasal using soil-based scavengers and microabes.
3.
Sea burial. Obviously this has advantages; it is easily accomplished, enters the sea food chain immediately, keeps the entire process clean and sanitary foar remaining Humans, and involves noa visually disturbing events whatsoaever. Haoever, this has significant problems which should be considered; unless properly prepared, bodies oar their parts could re-surface, either at the ocean surface oar on a shoar; the dump site would be littered with boans which makes investigation problematical; and finally, a dump site like that would be targeted by murderers for ideal, clean body dispoasal.