Ólafur Elíasson is a Danish-Icelandic artist known for sculptures and large-scale installation art employing elemental materials such as light, water, and air temperature to enhance the viewer’s experience. In 1995 he established Studio Ólafur Elíasson in Berlin, a laboratory for spatial research. Eliasson represented Denmark at the 50th Venice Biennale in 2003 and later that year installed The Weather Project in the Turbine Hall of Tate Modern, London. Eliasson has engaged in a number of projects in public space, including the intervention Green river, carried out in various cities between 1998 and 2001. Here is an interview with him by Chris Gilbert.