Now this is such a great summary of the options. I am biased to say my favourite is a Natural Burial Ground. Originally pioneered in the UK (we now have over 300 open in last 20 years) and are spreading around the world. To find out more about Natural Burial have a look at the Natural Death Centre Charity Web
Susan Morris, Trustee
The Natural Death Centre Charity, Association of Natural Burial Grounds @ndccharity
Educational charity which sees death as a natural part of life. Founded in 1991, it is committed to supporting cultural change and is working towards a situation where all people are empowered in the process of dying, and organising a funeral.