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Urban shade trees offer significant benefits in reducing building air-conditioning demand and improving urban air quality by reducing smog. The savings associated with these benefits vary by climate region and can be up to $200 per tree. Calculations suggest that urban trees play a major role in sequestering CO2 and thereby delay global warming.

DT Butry and GH Donovan

Butry D.T., and Donovan G.H. 2010. Trees in the city: Valuing street trees in Portland, Oregon. Landscape and Urban Planning. 94: 2, 77-83.

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