Cleaning the air and keeping areas cool are what trees do best. A new study has looked into how best to use trees from a purely utilitarian standpoint. Essentially they drilled down to what trees do best and where they can thrive. The researchers cataloged the best places to plant trees based on factors like removing particulate matter from the air and where they can have the greatest impact on local temperatures. As a result their research outlines the most efficient use of money when deciding where to plant more trees.
As always, the best time to plant a tree is today.
There is one catch, though: The tree-planting campaign has to be well-targeted. And that gets a bit complex.
Trees only improve air quality in their immediate vicinity, about 100 feet or so. That means cities need to figure out which neighborhoods benefit most from new trees (typically the densest areas, but also areas around hospitals and schools). They also have to plant species that are most effective at trapping pollution (typically those with large leaves).
Officials also need to account for things like wind patterns and tree spacing and figure out whether theyâ€™ll be able to maintain their trees. Plus, if water is scarce, theyâ€™ll want to consider drought-tolerant varieties. And they may want to steer clear of trees that increase pollen and allergies.