EN
Urban trees have decidedly a positive impact on people's lives. They satisfy diverse needs of local residents: psychological, aesthetic and spiritual ones, among others. Urban greenery creates a healthier, more comfortable environment. Such qualities make trees to be of a great value to society. Though trees are considered to have no monetary value. Indeed, the value of tree ecosystem services is difficult to estimate compared to the economic value of material goods. When planning an investment or city development concept a decision is generally made on a base of economic calculation. The article presents the results of the research, carried out from 2011 to 2016, on the lost value of ecosystem services due to the removal of street trees on a selected area of highly urbanized Warsaw district. The research also covered the difference between the value of mature trees and new plantings. The calculations were made on the basis of the urban forest valuation of ecosystem services method, developed by the Institute of Spatial Management and Housing in Warsaw. The method has succeeded in determining the economic value of ecosystem services and their benefits for people.