The protein fibre wool is able to absorb the air pollutant formaldehyde and to decompose it into elements that are harmless to human being (e.g. water).
Facts
People spend inside more than 90% of their time!
It is assumed that formaldehyde is above the critical value in 10% of all interiors.
Wool metabolises formaldehyde and thus cleanses the air irrespective of the concentration of formaldehyde and humidity in the room:
Picture 1: Absorption of formaldehyde subject to humidity
Picture 2: Absorption of formaldehyde subject to its concentration
Source: "Die Wolle - Ein Sorbens für proteinaktive Luftschadstoffe", DWI e.V. Aachen, AiF-Forschungsprojekt Nr. 13150 N1, "Einsatz von Wolle im Innenraumbereich zur Verbesserung der Luftqualität". [Research project no. 13150 N1 (interior use of wool for better air quality) carried out by DWI e.V. Aachen (German Institute for research on wool).]