Table 1.

Main characteristics of the schools.

School	Site	City zone	Traffic density	Classroom volume (m3)	Orientation of windows	Number of students
S1	Urban	E	High	268.03	WNW	40
S2	Urban	NW	Medium	159.56	SSE	21
S3	Urban	W	High	173.49	ESE	20
S4	Industrial	SE	Medium	36.17	WNW	25–30
S5	Industrial	E	Medium	109.09	ENE	26
S6	Industrial	SW	Low-Medium	97.67	SSE	60
S7	Rural	SE	Low	182.60	SE	8–12