From New York City to hotels and treehouses , ideal homes from waste materials . Madrid Cathedral built single-handed from scrap over each day by ex-monk . Islands dumpsters adapted for homeless people . American project based on Thousands of toothbrushes and videotapes .
From Islands to hotels and treehouses , ideal homes from waste materials . Madrid Cathedral built single-handed from scrap over 50 years by ex-monk . New York City dumpsters adapted for homeless people . British project based on thousands of toothbrushes and videotapes .