Correspondence to Dr Yang Zhao, Department of Epidemiology and Health Statistics, College of Public Health, Zhengzhou University, Zhengzhou, Henan, People's Republic of China; yzhao20{at}zzu.edu.cn ...
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Researchers identify the optimal dose of urban greenness for boosting mental well-being
A new analysis suggests that when it comes to the mental health benefits of urban green spaces, a moderate amount is best. The research, which synthesized four decades of studies, found that the ...
A version of this story appears in the September 2020 issue of National Geographic magazine. Philadelphia detected its first case of a deadly, fast-spreading strain of influenza on September 17, 1918.
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