There's a place by my cousin's home where, it's a crematorium but they have acres and acres of land they use as a "graveyard" but instead of graves people chose a tree to plant there.

And as for green burials and not being all pickled im harmful preservatives or boxed into concrete fortresses... I think you may like this interview:http://www.danielvitalis.com/rewild-yourself-podcast/mark-harris-on-grave-matters-and-green-burials