Old telephone books used for making walls

Architecture students at Dalhousie University are creating a one-room house using old telephone directories.
The house is a wood-frame structure about four metres by four metres. The phone books are held together by metal brackets. Windows are to be made of old bottles. Total cost of building materials: about $2,000.
Richard Kroeker is the professor who came up with the idea. He plans to check on it this winter to see how the house stands up to the elements.
Source: CBC Nova Scotia