Depression and Street Trees (01-27-21)

Marselle and colleagues link more street trees closer to homes to a decreased likelihood that residents will be depressed.  The investigators report that they  “analysed the association of street tree density and species richness with antidepressant prescribing for 9751 inhabitants of Leipzig, Germany. We examined spatial scale effects of street trees at different distances around participant’s homes, using . . . buffers of 100, 300, 500, and 1000 m. . . . we found a lower rate of antidepressant prescriptions for people living within 100 m of higher density of street trees. . . .

Trees and Academic Success (11-19-20)

Research confirms that trees do indeed add value to our lives.  Kuo, Klein, Browning, and Zaplatosch collected data for 450 schools and 50,000 students in communities ranging from rural to urban in Washington State and report that “‘Hundreds of studies show a positive link between contact with nature and learning outcomes. . . . We wanted to make sure the same pattern was true in this vulnerable and overlooked population,’ says Ming Kuo. . .

High Speed Green (08-07-20)

Jiang, He, Chen, Larsen, and Wang evaluated how driving on a freeway through various sorts of urban environments influences driver experience.  They found via 90-minute simulations of environments through which study participants “drove” at the legal speed limit (70–120 km/hour) that: “The summarized mental status measure is the average value of the seven measures of negative mental status (boredom, anger, frustration, tension, anxiety, avoidance, mental fatigue). . . . the tree-regularcondition evoked significantly lower levels of negative mental status than all other conditions.


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