I don't really know anything about this subject, so I am just going to uncritically repost some casual research.

For a long time, I've been hearing that wool can help clean indoor air pollution.   Modern buildings, particularly when new, often have malodorous and even unhealthy chemicals diffusing into the air from materials used in construction and finishing.  

Perplexity.ai gave the following response to the question CAN WOOL CLEAN INDOOR AIR?

Yes, wool can clean indoor air. Wool—whether used as insulation, carpeting, or in air filter technology—effectively removes harmful substances such as formaldehyde, sulfur dioxide, nitrogen oxides, and other volatile organic compounds (VOCs) from indoor environments. Its complex fiber structure and the presence of keratin allow wool to absorb and neutralize these pollutants, often reducing their concentrations to safe levels within hours or days

Wool also traps dust, allergens, and even bacteria, improving air quality and helping to relieve allergies. Unlike synthetic fibers, wool does not re-emit absorbed pollutants, even when heated, and it can continue purifying air for up to 30 years. Additionally, wool’s ability to regulate humidity helps reduce the risk of mold and dust mites, further contributing to a healthier indoor environment

Wool air filters, such as those developed by Lanaco, are also recognized for their effectiveness in removing toxic particles, viruses, pollens, and bacteria from the air, and have even been used by NASA for critical life support systems.

Perplexity offered a bunch of footnotes as part of the response to my question.  It also offered a bunch of anticipated followup questions:

• Can wool filters remove viruses and bacteria from indoor air effectively
• How does wool's biodegradability benefit long-term air quality improvement
• What specific pollutants can wool insulation or filters neutralize indoors
• Does wool's natural structure help in reducing microplastic pollution in homes
• How does wool compare to synthetic materials in maintaining healthy indoor air

With such research freely and instantly available to anyone with a web browser, I don't think there is any point in me doing more than intro this (AMAZING!!!!) topic!

14 June 2025 --- Ralph