[Physical effects of atmospheric pollution unconsciously perceived by citizenship, in the metropolitan area of Monterrey city, Nuevo León, Mexico].

Objective: Perceive the air pollution atmospheric by fine particles (PM25) in the human organism on the Metropolitan Urban Area of Monterrey [MUAM], Nuevo León; considering its effects and the sensorial detection capability by each subject's perception.

Materials And Methods: This research was made with 504 participating subjects exposed to the effects of the contaminants mentioned on the MUAM, Nuevo León, considering the background of each subject and their unconscious perception, in order to avoid the possible bias in the result.

Results: It was found that the present levels of environment pollution by fine particles affected on different ways the healthy participant subjects than the ones reported with any susceptibility or visual affection and/or respiratory illness.