What are trees worth to cities?

Categories: How To
Published on: April 23, 2016

CITYLAB / Laura Bliss / 21 April 2016

A man rides his bicycle along Rock Creek Park in Washington D.C.David Nowak whittles down 30 years of studying the economic value of forests to this advice: If you can only plant one tree, plant it in a city.

After all, in an era of overwhelming need for urban infrastructure improvements, trees offer cities some of the best bang for their buck. Trees remove carbon dioxide, filter air pollution, and produce oxygen. They absorb rainwater, UV radiation, and noise. They slow down traffic, improve property values, and reduce human stress and mental fatigue. And they provide shade, which means we have to use less energy to cool down.

“Trees help us avoid emissions in the first place, in addition to taking out carbon,” says Nowak, a lead researcher at the U.S. Forest Service’s Northern Research Station in Syracuse, New York. “It’s a big problem that they help us solve.”