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Green spaces and cognitive development in primary schoolchildren.
Payam Dadvand1, Mark J Nieuwenhuijsen2, Mikel Esnaola2
1Centre for Research in Environmental Epidemiology (CREAL), 08003 Barcelona, Spain; Experimental and Health Sciences, Pompeu Fabra University, 08003 Barcelona, Catalonia, Spain; Ciber on Epidemiology and Public Health (CIBERESP), 28029 Madrid, Spain; pdadvand@creal.cat.
Summary
Exposure to green spaces near schools boosts children's cognitive development, improving working memory and reducing inattentiveness. This benefit is partly due to decreased air pollution exposure.
Area of Science:
- Environmental Health
- Developmental Psychology
- Epidemiology
Background:
- Green space exposure is linked to improved physical and mental health.
- Limited epidemiological data exists on green space's impact on children's cognitive development.
- Understanding this relationship is crucial for public health and educational strategies.
Purpose of the Study:
- To assess the association between green space exposure and cognitive development in primary schoolchildren.
- To investigate the role of air pollution as a potential mediator in this association.
- To provide evidence for the benefits of urban greening on child cognitive function.
Main Methods:
- A cohort of 2,593 primary schoolchildren (7-10 years) in Barcelona, Spain, was studied.
- Cognitive development (working memory, inattentiveness) was tracked over 12 months using computerized tests.
- Outdoor greenness was measured using satellite data (Normalized Difference Vegetation Index) at home, school, and commuting routes.
Main Results:
- Increased greenness around schools and overall surrounding greenness correlated with enhanced working memory and reduced inattentiveness over 12 months.
- Elemental carbon (traffic-related air pollutant) partially mediated the association between school greenness and cognitive development.
- The models explained 20-65% of the association, highlighting the role of air quality.
Conclusions:
- Exposure to green space is beneficial for cognitive development in schoolchildren.
- The positive effects of green space are partly mediated by reduced exposure to traffic-related air pollution.
- Urban planning and environmental policies should consider green space integration to support child cognitive health.
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