Create an Environmental Legacy at Prairie Oaks Memorial Eco Gardens - Minnesota's First Green Cemetery! Prairie Oaks, as a land restoration project, will provide habitat for wildlife, a more diverse ecosystem, and more meaningful burial options for people who want to make a positive impact on the environment. Green cemeteries do not allow toxic embalming fluids, metal caskets, concrete vaults, or standing grave markers. Green cemeteries are green spaces. They often look like parks. Prairie Oaks will be planted with a variety of trees, native grasses and wildflowers which will be nourished by the graves of outdoor enthusiasts, environmentalists and folks who just think green burial makes sense.