Fast Fact Library

Urban greenery can play a significant role in absorbing atmospheric carbon dioxide. According to a Columbia University study, trees, shrubs, flowers, herbs, and grasses in the five boroughs of New York City...

Wei, Dandan, Andrew Reinmann, Luke D. Schifer, and Roisin Commane. High resolution modeling of vegetation reveals large summertime biogenic CO₂ fluxes in New York City. Environmental Research Letters 17, 12 (2022). https://doi.org/10.1088/1748-9326/aca68f.

Areas of urban forest can contain as much carbon in above-ground biomass as similarly sized areas of tropical rainforest, according to a LiDAR analysis of trees in the London Borough of Camden.

Wilkes, Phil, Mathias Disney, Matheus Boni Vicari, Kim Caleders, and Andrew Burt. Estimating urban above ground biomass with multi-scale LiDAR. Carbon Balance Manage 13, 10 (2018). https://doi.org/10.1186/s13021-018-0098-0.

The monetary benefits of urban trees outweigh their maintenance and other associated costs. In a study of five U.S. cities, each dollar invested in urban trees returned between $1.37 and $3.09 in benefits. Benefits...

McPherson, Greg, James R. Simpson, Paula J. Peper, Scott E. Maco, and Qingfu Xiao. (2005). Municipal forest benefits and costs in five U.S. cities. Journal of Forestry 103(8), 411-416.

Carbon sequestration rates are up to 90 times greater for healthy large trees than healthy small trees. In Chicago's urban forest, a typical 3-in diameter tree sequesters approximately 2.3 lbs annually, which is...

McPherson, Gregory E., David J. Nowak, Rowan A. Rowntree. (1994). Chicago’s Urban Forest Ecosystem: Results of the Chicago Urban Forest Climate Project. USDA Forest Service Northeastern Forest Experiment Station General Technical Report NE-186, 63-81.