21世纪被称为“城市世纪”,世界已经进入“城市时代”。大量的建筑群则是城市的标志和载体,随着城市的发展不断扩张,一幢幢拔地而起的建筑物像不知餍足的巨兽,消耗着大量资源和能源,并排放出废物。在世界范围内,建筑耗能占总利用能源的45%,二氧化碳排放量占35%,饮用水抽取量占8 The 21st century is known as the “city century”, the world has entered the “city era.” A large number of buildings are the hallmark and carrier of the city. With the continuous expansion of the city, buildings rising up like lurking behemoths consume a great deal of resources and energy and emit wastes. Worldwide, building energy consumption accounts for 45% of total energy use, carbon dioxide emissions account for 35% and drinking water withdrawals account for 8%