Greenspace and Natural Environments
Exposure Definition
Exposure to vegetated land (parks, forests, street trees, gardens) and natural environments. Measured by NDVI (Normalized Difference Vegetation Index), distance to parks, or percentage of green land use. Greenspace is associated with improved mental health, reduced cardiovascular risk, and potentially lower air pollution and heat exposure. Mechanisms may include stress reduction, physical activity promotion, and microbiome diversity. Urban planning and equity in access are modifiers.
Proxies
| Name | Unit | Measurement | Data source |
|---|---|---|---|
| NDVI | unitless index | Satellite imagery | Landsat, MODIS |
| Distance to nearest park | meters | GIS | Local land use |
Biological Systems Affected
mental health
Stress reduction; attention restoration; social cohesion
cardiovascular
Possible via physical activity and stress; mixed evidence
immune
Microbiome and immune regulation (e.g., hygiene hypothesis); speculative
Sensitive Developmental Windows
childhood (0-18)
Early-life exposure may shape immune and mental health trajectories
GxE Highlights
No GxE highlights recorded.
Tissue-Specific Notes
No tissue-specific notes recorded.
References
- 1.Twohig-Bennett C, Jones A (2018). Green space and health. Environmental Research. doi:10.1016/j.envres.2018.06.030