The primary cause of indoor air pollution are the gases or particles into the air because of inadequate ventilation. Inadequate ventilation increases the indoor pollutant levels by not bringing in enough outdoor air to dilute indoor emissions which leads to the failure of carrying indoor air pollutants out of the household. Dust, moisture, fungus, molds, pet dander, Volatile Organic Compounds (VOC), odour causing contaminants, bacteria in washrooms, high humidity and temperature also increases the levels of indoor air pollution.
