http://news.xinhuanet.com/english/sci/2014-04/25/c_133290171.htm
Ma Yihe, the inventor of the printer says the process is economical and environmentally sound using cement and mining tailings. Houses can be gmade to specifications and can be multi storied. Ma says the printers could create sky scrapers. Chinese regulations do not yet address printed multi story buildings. These buildings are ten meters wide and 6.6 meters tall.
