My preference for burial over cremation is biological/ecological. The natural way of things is for us to assimilate (sp?) atoms and molecules into ourselves throughout our lives, just like every other living organism. When organisms die, they decompose and their 'substance' returns to the ground to be recycled and used again. I prefer to think that is what will happen to my body - they way it should, than for it to be incinerated and most of the useful stuff be turned into something useless (or even damaging). The burial ground I have in mind uses natural fibre shrouds and 'coffins' so that decomposition can happen naturally, and has no 'proper' grave markers - trees are planted instead, so the area becomes a woodland over time. No graves for family to feel they should tend.