Kids who grow up around green space tend to have better mental health as adults.
Researchers in Denmark followed more than 900,000 people from birth, using satellite images to measure how much green surrounded each child's home through age 10. Then they tracked their mental health into adulthood.
The children who grew up with the least green space had up to 55% higher risk of developing a psychiatric disorder later in life.
The link held even after accounting for income, family history, and whether kids lived in a city. And it was dose-dependent.
More years near green, lower risk.
The effect did not require wilderness. A neighborhood with trees or a field within walking distance was enough.
We tend to file green space under nice to have.
For a kid's developing mind, the research keeps pointing somewhere closer to essential.