This volume documents the proceedings of the Third International Clean Air Congress, held in Düsseldorf in 1973. It presents research and discussions on the critical issue of air quality and the strategies for its improvement. The congress brought together international experts to share findings and foster collaboration in the field of pollution control.

This collection serves as a historical record of the state of clean air research and policy in the early 1970s. It offers valuable insights into the foundational challenges and solutions discussed by leading international experts at the time. The proceedings likely reflect the scientific understanding and technological capabilities prevalent in the era, providing a benchmark for historical analysis of environmental policy.