Research press release


Scientific Reports

Health: Urban trees could make you feel healthier


今回、Marc Bermanたちは、都市部の各地区の緑地(特に街路樹、公園、各家庭の庭など)と住民が自覚する健康感との関係を調べた。Bermanたちは、トロント(カナダ)の住民31,109人を対象としたオンライン質問票に対する自己申告データを用いて、街路樹の密度の高い地区の住民の方が、自覚的健康感が高いことを明らかにした。また、街路樹の少ない地区の住民と比べて、高血圧症や肥満などの心臓・代謝性疾患が少ないことも明らかになった。



Increases in the number of urban trees could make people feel healthier and reduce instances of cardio-metabolic conditions according to research in Scientific Reports this week.

Marc Berman and colleagues investigated the relationship between neighbourhood greenspace, specifically trees besides streets and in other areas such as parks and domestic gardens, and people’s perceived level of health. Using self-reported data from 31,109 residents in Toronto via an online questionnaire, the authors found that people who live in areas with a higher street tree density reported having a better perception of their health. They also reported fewer cardio-metabolic conditions such as hypertension and obesity compared to those participants living in areas with fewer trees on the street.

The authors found that an increase of ten street trees per block, equivalent to a four percent increase in tree density, increased health perceptions comparably to increasing each household’s income by $10,200, or being seven years younger. Increasing the number of trees to 11 led to a decrease in cardio-metabolic conditions comparable to an increase in personal income of $20,000 a year or being 1.4 years younger.

Although the study does not identify the mechanisms by which the benefits may occur, the authors suggest that improving air quality, relieving stress and promoting physical activity could all be contributing factors to improved reported health.

doi: 10.1038/srep11610

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