The pioneering Danish researcher, Ole Fanger, has died aged 72. A senior professor at the International Centre for Indoor Environment and Energy at the Technical University of Denmark, Fanger was one of the world’s leading experts on the effects of indoor air quality on humans.

Fanger and his team at the Technical University were the first to document that poor indoor air quality in homes increases children’s risks for developing asthma and allergies and that mediocre indoor air quality in offices decreases productivity. His field studies also revealed that pollution from building materials, electronic devices and HVAC systems is often a cause of poor indoor air quality.

Fanger died from the rupture of an abdominal aortic aneurysm while visiting Syracuse University, where he was a visiting scholar.