The greening of vacant lots can reduce self-reported feelings of depression in adults. In a Philadelphia study of 324 participants living in an area where 110 vacant lots received clean-up and greening interventions, the number of participants self-reporting feelings of depression decreased by 41.5% after vacant lot greening.
South, Eugenia C., Bernadette C. Hohl, Michelle C. Kondo, John M. MacDonald, and Charles C. Branas. “Effect of Greening Vacant Land on Mental Health of Community-Dwelling Adults: A Cluster Randomized Trial.” JAMA Network Open 1, no. 3 (2018). https://doi.org/10.1001/jamanetworkopen.2018.0298
