Green burial is a way of caring for the dead with minimal environmental impact that furthers legitimate ecological aims such as the conservation of natural resources, reduction of carbon emissions, protection of worker health, and the restoration and/or preservation of habitat. How does green burial differ from conservation burial? Conservation burial is a term coined by the Green Burial Council at the 2005 Land Trust Alliance National Rally. The concept calls for a cemetery's adherence to a number of protocols to ensure that burials never degrade an ecosystem and, where possible, facilitate ecological restoration. It requires that surveys (biological, geological, hydrological) be done to determine where burial should and should not take place on a piece of land, and at what density. Most significantly, conservation burial requires that an established, independent conservation organization, most often a land trust, serve as steward of this land and be willing to hold a conservation easement. This legally enforceable instrument, which runs with the land, guarantees that the standards for conservation burial, set forth by the Green Burial Council, will be upheld in perpetuity.