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People who move from urban areas with less vegetation to places with more report improved mental health.

Mathew White and his colleagues at the University of Exeter Medical School in Truro, UK, used British Household Panel Survey data to analyse the change in mental health scores over five years for people who had moved from one urban residential area to another during that time period. The researchers controlled for changes in individual's lives, such as employment and marital status, and found that moving to a leafier area led to an immediate and sustained improvement in mental health.

People who moved to less green areas reported worse mental health, but returned to their baseline level after the move.

Environ. Sci. Technol. 48, 1247–1255 (2014)