‘I’m a prisoner of hope’: Olafur Eliasson on using art to bring us together to save the world

A 40-tonne sculpture unveiled late last year beneathInside Presence, the Icelandic-Danish artist’s epic new show in Brisbane, what you see changes based on where you stand or how you look – crucial when it comes to tackling the climate crisis the waters of Tokunoshima in Japan waits to be reclaimed by fish and coral