Wallsten, Björn; Johansson, Nils; Krook, Joakim - In: Journal of Urban Technology 20 (2013) 3, pp. 85-103
Our societies are reliant on metals to such an extent that the total amounts of some of them in the built environment are comparable in size to the remaining amounts in known mountain ores. Because of concerns about mineral scarcity, the United Nations has assessed alternative sources for metal...