| doc-title | Assessing Urban Forest Effects and Values |
| quote | Pollution removal by trees and shrubs in New York City was estimated using the UFORE model in conjunction with field data and hourly pollution and weather data for the year 2000. ... It is estimated that trees and shrubs remove 2,202 tons of air pollution (CO, NO2, O3, PM10, SO2) per year ... Trees remove about three times more air pollution than shrubs in New York City. |
| source | Assessing Urban Forest Effects and Values (USDA Forest Service) |