TAILINGS: Burtynsky's skill as a photographic colourist is evident in most of his work, but perhaps most strikingly in a group of photographs of nickel tailings near Sudbury, Ontario. Juxtaposing pulsating orange against a glossy black background, he extracts spectacular images from a landscape that many might consider unphotogenic. The startling colours are those we see when lava flows from an erupting volcano, which is perhaps why we immediately associate this image with natural disaster. In actual fact, the intense reds and oranges are caused by the oxidation of the iron that is left behind in the process of separating nickel and other metals from the ore.