It is known that green areas contribute to better health for citizens. The Instituto de Saúde Pública of the Universidade do Porto carried out a study that evaluated the positive impact of the existence of trees in the proximity of 20 primary schools in the city of Porto, verifying the decrease of nitric oxide levels.
The aim of the study was to understand whether the density and type of trees near schools affects the inflammation of the children's airways. Thus, according to the number and type of trees at a distance of 500 meters from these schools, the researchers evaluated the pulmonary function and the level of airway inflammation in a universe of 845 children. It should be noted that the trees present in the study were coniferous (ex: pines) and broadleaf (ex: plantains) and the marker used for the assessment was the nitric oxide exhaled by the children.
The conclusions of this study point to a decrease in airway inflammation by children who study in schools with a higher density of broadleaf or coniferous trees, in the proximity, as a result of exhaling less nitric oxide.
These beneficial effects of the existence of trees near schools are reflected, in the opinion of the authors, both in asthmatic children and in healthy children.
Hidurbe actively contributes to greener cities, aiming to improve the quality of life and the air we breathe.
Learn more about this study here.