59 正在建筑的地下建筑有:纽约植物园、威斯康星环境研究中心、明尼苏达和阿肯萨斯计算中心、Purue大学图书馆的扩建部分、Iowa保险公司总部办公室和Simthsonian学会的扩建部分;柏林在建筑新的公路隧道,同时,美国巴尔的摩也在建筑大直径的沉管隧道;美国DOE在征集利用地热能的方案,并发行标示了可能有地热的区域的地图;肯尼亚开始进 59 The underground buildings under construction are: New York Botanical Garden, Wisconsin Environmental Research Center, Minnesota and Arkansas Computing Center, Purue University Library Extension, Iowa Insurance Company Headquarters Office and Extension of Simthsonian Society; Berlin is in the construction of new Highway tunnels, while Baltimore, USA, is also building large-diameter immersed tunnels; the US DOE is soliciting plans for the use of geothermal energy and issuing maps indicating areas where geothermal energy may be present;