The national eco-friendly movement toward green burials has a new friend in the Denver-based Prairie Arts League, which aims to preserve a large tract of Colorado prairie as a wildlife refuge. To finance the project, the group is selling space in a cemetery that will be a final resting place for folks who want to be scattered to the winds or go into the ground naturally, without the frills of embalming, fancy caskets, vaults or expensive memorials. As a result, local grasses and wildlife -- instead of the manicured lawns of cemeteries or the metal and concrete of development -- can reinhabit the prairie. Ashes to ashes.