Which Brian Eno album is fundamental to ambient music?

Ambient 1: Music for Airports

With "Ambient 1: Music for Airports," Brian Eno introduced a revolutionary concept in music: creating a work specifically designed to be as interesting as it is ignorable. This non-intrusive approach was a major innovation, laying the groundwork for the ambient music genre. The album aimed to alleviate the anxiety of air travelers, marking a turning point in the perception of electronic music not only as entertainment but also as a tool to enhance daily well-being.