Most people appreciate trees for their beauty and the shade they provide on a hot summer afternoon.
But the collective effect of trees throughout a neighborhood or city goes much further.
Researchers systematically reviewed 73 peer-reviewed studies, and their conclusion provides another compelling reason to value our community tree canopy:
“Urban greenspaces generally have cooling effects.”
— Li et al., Arboriculture & Urban Forestry, 2026
Why Trees Make Such a Difference
Walk across an exposed asphalt parking lot on a hot summer afternoon and then stand beneath the canopy of a mature shade tree.
The difference isn’t difficult to appreciate.
Buildings, pavement and other developed surfaces absorb solar energy and contribute to higher temperatures. Trees intercept sunlight while vegetation also participates in processes that can help moderate the surrounding environment.
Multiply those effects across hundreds or thousands of trees and urban forests become an important part of how communities respond to heat.
Not All Tree Canopy Is the Same
One of the interesting findings from the USDA-listed research is that cooling isn’t governed simply by whether trees are present.
Researchers identified several factors influencing cooling effects, including:
- Amount of tree cover
- Canopy structure
- Tree and forest type
- Tree species
- Leaf area
- Arrangement of vegetation
- Local climate and weather
In other words, what we plant, where we plant it and how well we maintain it matter.
Mature Trees Are Valuable Community Infrastructure
It takes years for a newly planted tree to develop the canopy of a mature specimen.
That’s one reason existing healthy trees deserve thoughtful management.
A mature tree may be providing shade to a house, sidewalk, driveway or public space while contributing to the larger neighborhood canopy.
Removal is sometimes necessary because of condition, location, development or safety concerns. But when a healthy mature tree can reasonably be retained, its existing canopy has real value that a small replacement tree cannot immediately reproduce.
Planting the Right Tree Matters Too
Preserving trees is only half of the equation. Communities and property owners also need the next generation.
Successful planting starts with choosing trees appropriate for their location.
Consider:
- Available space at maturity
- Proximity to buildings
- Overhead utilities
- Soil and drainage
- Sunlight
- Expected mature canopy
- Long-term maintenance
Planting a tree that will ultimately outgrow its location can create conflicts decades later. Choosing the right tree for the right place gives it a much better opportunity to become tomorrow’s mature shade tree.
Think of Trees as a Long-Term Investment
Tree care is often discussed in terms of individual jobs — pruning a branch, removing a hazardous tree, grinding a stump or planting a replacement.
There’s also a bigger picture.
The decisions homeowners make about their trees today help determine what their properties and neighborhoods will look and feel like decades from now.
The Bogan Tree Service takeaway: Healthy trees aren’t simply landscaping. They’re long-lived assets that provide shade, beauty and environmental benefits year after year. Proper maintenance helps preserve good trees, while thoughtful planting ensures that future generations have a healthy canopy to inherit.
Read the Original Research
The USDA Forest Service provides the abstract, citation and full research paper for “A Systematic Review of the Cooling Effects of Urban Forests.”
https://research.fs.usda.gov/treesearch/80536
Source: USDA Forest Service Research & Development / Li et al., Arboriculture & Urban Forestry (2026). Original source material is quoted for educational and commentary purposes.
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