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Story perspectives

Study Links Green Space to Health in U.S. Cities

10/7/2025

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Story summary
  • The study uses the National Land Cover Database (NLCD) to analyze green space in U.S. developed areas.
  • NDVI and tree canopy—data from the U.S. Forest Service (USFS)—are primary measures.
  • Developed areas are categorized by impervious surface into open space and density.
  • Tukey’s test and paired t-tests relate green space to health; demographics come from the American Community Survey.