The Qatsi Series or Trilogy, directed by Godfrey Reggio, consisting of visual images and sound which chronicle the destructive impact of the modern world on the environment.

Koyannisqatsi 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 an apocalyptic vision of the collision of two different worlds, urban life and technology versus the environment. The musical score was composed by Philip Glass.
Powaqqatsi is the second film of the Qatsi trilogy, and presents an overall focus on natives of the Third World, the emerging cultures, and how they express themselves through work and traditions.
Naqoyqatsi is the third film of the Qatsi trilogy. It's a journey into a land where the real gives way to the virtual. As the gods of old become dethroned, a new pantheon of light appears in the integrated circuit of the computer. Its truth, becomes the truth.