Living in a neighborhood filled with trees may have more benefits than just aesthetic appeal. Recent research suggests that it can actually have positive health benefits, potentially improving public health outcomes. A study conducted by researchers at the University of Louisville found that individuals living in areas with double the number of trees and shrubs had lower levels of a biomarker of general inflammation, which is linked to a higher risk of heart disease, heart attacks, diabetes, and certain cancers.
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The study involved 745 participants residing in a four-square-mile area of South Louisville, Kentucky. Researchers collected data from these individuals before and after planting over 8,000 trees and shrubs within a portion of the study area. The results showed that those living near more tree coverage had 13% to 20% lower levels of the inflammation biomarker, a difference comparable to the impact of regular exercise.
Lead researcher Aruni Bhatnagar, a professor of medicine at the University of Louisville, stated, “Although several previous studies have found an association between living in areas with high surrounding greenness and improved health, this is the first study to demonstrate that intentionally increasing greenness in a neighborhood can enhance health outcomes.”
Additional studies have shown that greening urban areas can have various health benefits. A 2018 study from the University of Pennsylvania found that greening vacant city lots can reduce stress and depression. Studies have also suggested that living near trees can improve mental health and may even increase life expectancy.
In response to these findings, cities like Philadelphia are taking action to increase their tree canopy coverage. The Pennsylvania Horticultural Society is working to expand the city’s tree canopy by 20-30% over the next decade, aiming for 30% tree coverage in each neighborhood by 2035. This initiative was prompted by a 2019 report that revealed a decline in the city’s tree canopy.
How to get a free tree for your yard in Philly
Philadelphia Parks & Recreation offers over 1,000 free trees each spring and fall through the TreePhilly program, in partnership with the Fairmount Park Conservancy. Residents can pick up trees at community events held in April, May, October, and November. For those with limited mobility, applications are available for tree delivery and planting by arborists.
Residents and businesses can also request trees to be planted along their sidewalks by Parks & Recreation. Alternatively, property owners can hire a certified arborist to plant a tree along their sidewalks at their own expense.