The newly launched Healthy Trees, Healthy Lives website (https://healthytreeshealthylives.org/) is an excellent source of information on the health benefits of trees. The website was developed by the Southern Group of State Foresters Urban and Community Forestry Committee and funded through a Landscape Scale Restoration grant.

The Health Benefits section of the website divides 14 benefits into 4 categories: physical (skin, heart, lungs, pregnancies/newborns, comfort/heat reduction, nutrition, fitness), mental (peace of mind, vitality, brain), healing (fighting power, healing, health), and financial (healthcare savings). Each benefit is described in a sentence or two, and links to published research papers on each benefit are included.

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As the hilarious, award-winning Nature RX video series points out, spending time in nature is a potent “drug” for alleviating the day-to-day stress we all face. It is also a powerful way to combat anxiety, depression, and mental illnesses such as schizophrenia. The average American is sorely in need of the stress-relieving boost provided by trees. Eighty percent of American adults are afflicted by stress; forty million are affected by anxiety disorders, and nearly sixteen million experience major depression each year.

In recent years, the medical community has been increasingly recognizing the importance of trees to mental health. A growing number of scientists have been studying and documenting the health benefits of trees. For example, one study found that a 25% increase in neighborhood tree canopy was associated with a 1-point decrease on a 5-point scale for depression, anxiety and stress. Another study analyzed MRI scans of the brains of urban residents who live close to a forest. These residents were found to have an amygdala structure that is associated with a greater ability to cope with stress. (Source)

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By Robert Allard, Urban and Community Forestry Coordinator, Rhode Island DEM

This year, as families all over the country spend more time at home, we have been given the opportunity to appreciate the fresh air that we can enjoy on our own back porches and front stoops more than ever.  Trees are a significant factor contributing to the quality of the air we breathe. Recent research shows that even relatively small trees bring benefits to their neighborhoods. Just a single tree has the potential to filter up to one third of fine particulates such as dust, dirt, soot, and smoke within 300 yards, and can reduce particulate matter inside homes by as much as 60%.

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Thanks to the efforts of researchers over the past few decades, we have a solid understanding of the ecological benefits of urban forests, such as reduced greenhouse gases, decreased stormwater runoff, and lessening of the urban heat island effect. In contrast, knowledge of the human health benefits of urban forests is still developing. Existing reviews of health benefits have focused more broadly on nature, green space, and greenness rather than concentrating specifically on urban trees.

To address this gap, a team of scientists reviewed the existing quantitative research on the relationships between urban trees and human health. Their findings were published last month in the International Journal of Environmental Research and Public Health in the article Urban Trees and Human Health: A Scoping Review.  

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By Kim Ballard, Outreach Coordinator, Project Canopy, Maine Forest Service

Credit: Kim Ballard

2020 has been quite the year already – from extreme weather to the pandemic to civil unrest, we could all use a break from stress and anxiety. As the days are now at their longest, and lots of sun is in the forecast, it is the PERFECT time to step outside and get some much deserved fresh air and exercise. Parks are open and trees are masters at lowering your heart rate, your blood pressure and cortisol (a stress hormone) levels in your bloodstream. Tree-lined paths are cooler than the asphalt sidewalk, contain less air pollution than shared bike lanes and likely even have less crime than neighborhoods with no tree canopy. And if you are anything like me, a quarantine-enhanced waistline could benefit from some exercise provided by a brisk walk outdoors. Any way you look at it, trees are really good for us. And some good news would be really welcome right now.

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