Urban green space and happiness in developed countries
Oh-Hyun Kwon, Inho Hong, Jeasurk Yang, Donghee Yvette Wohn, Woo-Sung, Jung, Meeyoung Cha

TL;DR
This study analyzes how urban green space influences happiness across 90 developed countries, revealing that green space and GDP impact happiness differently depending on a country's wealth, with social support mediating this relationship.
Contribution
It provides a global analysis linking urban green space to happiness, highlighting the mediating role of social support and the moderating effect of GDP across diverse socioeconomic contexts.
Findings
Urban green space and GDP each correlate with happiness.
In wealthier countries, green space explains happiness; in others, GDP does.
Social support mediates the green space-happiness relationship.
Abstract
Urban green space has been regarded as contributing to citizen happiness by promoting physical and mental health. However, how urban green space and happiness are related across many countries of different socioeconomic conditions has not been explained well. By measuring urban green space score (UGS) from high-resolution Sentinel-2 satellite imagery of 90 global cities that in total cover 179,168 km and include 230 million people in 60 developed countries, we reveal that the amount of urban green space and the GDP can explain the happiness level of the country. More precisely, urban green space and GDP are each individually associated with happiness; happiness in the 30 wealthiest countries is explained only by urban green space, whereas GDP alone explains happiness in the 30 other countries in this study. Lastly, we further show that the relationship between urban green space and…
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