welcome to "hardta," with me, zeinab badawi, from tate modern in london, where my guest has a major exhibition. he is the award-winning, icelandic-danish artist olafur eliasson. he believes that art can change the world by, for instance, helping to tackle climate change. and e idea is to get peopleinkiy about the environment. for instances could our buildi the future be made with more sustainable materials. is this kind of thinking visionary or just simply farfetched? olafur eliasson, welcomto "hardtalk." thank you, zeinab. you had a fairly unorthodox upbringing. your parents were extremely young when they had you-- your mother 20, you father 19-- born in iceland, moved to denmark. your mother was a seamstress, ather a cook. how did ur early life influence you and your work? well, my father moved back to iceland, and so i always spent my vacations in iceland, tucking arouou in nature when he wapainting. he also worked as an artist, actually, and my mother, then, in demark would make sure i would go to school, and we would say tdt my mother sort of the more disciplined approach to life, where m