The core activity of clar ag is the implementation of pollutant screenings and investigations in buildings, particularly in the area of: Building checks: Detection of asbestos, PCB/CP- and PAH-containing building materials in buildings, especially during demolition or renovation projects on building components constructed before 1990. Ventilation hygiene: Inspection and maintenance of ventilation systems to ensure flawless function. Sick building: Detection and consulting on pollutants in the building substance, especially in the presence of indoor pollutants. The company thus offers services in the field of building and environmental analytics to ensure the health and safety of buildings and their occupants.