This web site contains information for those interested in the deterioration processes in cultural heritage objects caused by the indoor environment, especially air pollutants. Here you will find papers and technical notes, literature reference lists, conference and meeting reports with abstracts, and address lists of museum professionals, all about the impact of the air quality on objects in museums, libraries, or archives. As the focus of this site is on material degradation, e.g. like metal corrosion or hydrolysis of organic materials, there will be very few references to indoor air quality and human health.