“The benefits of earth sheltering are numerous. They include: taking advantage of the earth as a thermal mass, offering extra protection from the natural elements, energy savings, …requires low maintenance, and earth sheltering commonly takes advantage of passive solar building design. Earth shelters also provide privacy from neighbors, as well as soundproofing. The ground provides acoustic protection against outside noise. This is a major benefit in urban areas or along highways with constant traffic. In urban areas, one of the other major benefits of underground sheltering is the efficient use of land. Many houses can sit below grade without spoiling the habitat above ground. Each house can have both a house and a lawn/garden within the same site.”