Told without dialogue, a story or characters, Koyaanisqatsi is a visually arresting, apocalyptic vision of the collision of two different worlds - urban life and technology versus the environment.

Reggio's debut as a film director and producer, is the first film of the QATSI trilogy. The title is a Hopi Indian word meaning "life out of balance." Created between 1975 and 1982, the film is a landmark apocalyptic vision of the world is a mesmerising audio-visual journey across landscapes being changed by technologies that know no bounds. Told without dialogue or narration but with an electrifyingly hypnotic score by Philip Glass.