A video on green burial from the Green Burial Council:
Green burial is an organic means of returning the deceased to the ecosystem. The interred body is not embalmed and is buried in either a shroud of natural materials or an unvarnished, unpainted casket of biodegradable materials. At CGBG cemeteries, the deceased may have a tree planted atop the grave to memorialize your loved one and to allow new life to spring from death.
Green burial offers an alternative to toxic burial practices or, in the case of cremation, the unnecessary burning of fossil fuels. It provides a posthumous means of respecting and contributing to the ecosystem.
Green burial grounds merge land conservation with the practical cause of caring for our deceased. They preserve precious green space, promote reforestation, and serve as a symbol of mankind's respect for and gratitude to nature.
Bodies buried organically enrich soil and feed vegetation that produces oxygen and contributes to the vitality of nature. It is a final act of giving back to nature what nature has given us. The nutrients of our bodies are thus passed on to future generations.