Question: what are the causes of poor indoor air quality?
Answer: Biological Agents. These agents include mold, pollen, bacteria, viruses, and animal dander. ...  Cigarette Smoke. A large cause of indoor air pollutants is secondhand smoke. ...  Combustion Agents. ...  Radon Contamination. ...  Formaldehyde & Asbestos. ...  Increase Ventilation. ...  Use An Ultraviolet Air Purifier. ...  Reduce Indoor Humidity.