Researchers used Centers for Disease Control and Prevention data on 40,307 adults and matched those records with satellite maps of tree cover. They analyzed data for every census block to see if more residential trees relate to lower allostatic load, a measure of the body's wear and tear from chronic stress.
Overall, higher tree canopy was generally linked with lower allostatic load, but the link did not hold for the most vulnerable groups. People with higher income and education who were employed showed the expected benefits. Researchers say other problems — like discrimination, few good jobs, and poor neighborhood conditions — may reduce nature's benefits. They conclude that planting trees helps public health, but it must be combined with policies to reduce social and economic inequality.
Difficult words
- allostatic load — measure of body wear and tear from stress
- tree canopy — tree leaves and branches over an area
- chronic — continuing for a long time or often
- vulnerable — likely to be harmed or to have problems
- discrimination — unfair treatment of people for certain reasons
- inequality — difference in social or economic power and chances
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Discussion questions
- Do you have many trees where you live? How do they affect your everyday life?
- Do you think planting trees would improve public health in your neighborhood? Why or why not?
- What social problems in your area might stop people from getting benefits from nature?
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