Living Among Green, and Living Longer

Commissioned to inform World Health Organization guidance, this meta-analysis set out to put a defensible number on a widely held intuition: that living near green space is good for you. The authors pooled nine long-term cohort studies following more than eight million people across Australia, Canada, China, Italy, Spain, Switzerland and the United States, all using the same satellite-based measure of surrounding greenness. Seven of the nine found that more greenery near the home went with a lower risk of dying during follow-up. Pooled together, each incremental rise in greenness within 500 metres of home was associated with roughly a four per cent lower risk of death from any cause. That is a modest effect for one person, but across whole populations it is the kind of shift public-health planners take seriously, which is why the authors framed green space as a strategic intervention rather than an amenity. Where the evidence stops: these are observational studies, so greener areas may differ in wealth, air quality or walkability in ways that account for part of the benefit, and the authors flagged high statistical heterogeneity between studies. What survives those caveats is a consistent direction across millions of lives on three continents. Proximity to nature tracks with longevity.