"A green alternative to cremation... dissolving the body in heated alkaline water."

"Body tissue is dissolved and the liquid poured into the municipal water system. Mr Sullivan, a biochemist by training, says tests have proven the effluent is sterile and contains no DNA, and poses no environmental risk. The bones are then removed from the unit and processed in a 'cremulator,' the same machine that is used to crush bone fragments following cremation into ash. Metals including mercury and artificial joints and implants are safely recovered."

Or... try Promession:

Coffins are fed in one end [of a machine], and the body removed from the coffin within the unit and then treated with liquid nitrogen.

The body is then vibrated until the body fragments, after which the remains are dried and refined further, and then passed through filters to remove metals, including dental amalgam. The remains are then poured into a square biodegradable coffin, again automatically, for shallow burial.

And the whole thing is supposed to become soil fairly quickly.

Here's my question: Isn't old-fashioned burial greener? It's carbon sequestration, right?