在明尼苏达的Minncapolis,4月至11日的土掩房屋建筑会议和展览出席人数将近2000,是地下房屋会议最大的一项数字,是由明尼苏达大学地下空间中心和美国地下空间学会( AUA)联合发起的。明尼苏达协会——美国建筑师学会和明尼苏达专业工程师协会为协助发起人,计有18个单位的赠送和土掩房屋建筑作品及服务部门的54种展品作为展出。 In Minncapolis, Minnesota, the attendance of adobe housing construction conferences and exhibitions from April to 11 was nearly 2,000. It was the largest number of underground housing conferences. It was initiated by the University of Minnesota Underworld Center and the American Institute of Underground Space (AUA). of. The Minnesota Association, the American Institute of Architects and the Association of Professional Engineers of Minnesota, assisted the promoters by exhibiting 18 units of donations and 54 exhibits of the construction and service departments of the adobe houses.