The main reason of the sick building syndrome focusing the Indoor Air Quality in buildings is

Contamination from inside the buildings

Contamination from outside buildings

The main reason of the sick building syndrome focusing the Indoor Air�

1.	The main reason of the sick building syndrome focusing the Indoor Air Quality in buildings is
A.	Inadequate ventilation
B.	Contamination from inside the buildings
C.	Contamination from outside buildings
D.	Microbial contamination
Answer» B. Contamination from inside the buildings