**2.5 Health effects of indoor air pollutants**

Indoor air pollutants that are emitted from different sources occupy the living and get entrance to our internal body systems usually through inhalation. Although the target organs may vary from one pollutant to another, the most common are the lungs, eyes, and nervous system. It is important to understand the kinetics and metabolism of pollutants for better knowledge of their effects on the human body system.
