162 Dadea et al.: Tree Species as Tools for Biomonitoring and Phytoremediation in Urban Environments state of an urban environment and to lower the amount of specific pollutants. It must also be pointed out that intrinsic species properties (e.g., tolerance and/or bioindication capacity for a specific contaminant) can help planners to create an effective monitoring net in strate- gic points of a city, or to detect single contami- nants representative of a specific anthropogenic impact. Actually, only implementing larger- scale projects will help determine whether green infrastructure will have measurable effects on climate, air and water quality, and human health at a municipal scale (Pataki et al. 2011). Furthermore, those trees can be also used for ecosystem restoration (see Zerbe and Wiegleb 2009). The selection of species and the management practices with regard to phy- toremediation should promote a sustainable urban development to mitigate pollution in order to achieve a healthier urban environment. There are several successful examples of phy- toremediation projects in cities, as stated by Fel- son and Pickett (2005), Kirkwood (2011), Sousa (2003), and Wilschut et al. (2013). For example, a field of birch trees was used to remediate the soil on the site of the former blast furnaces of Duisburg-Nord Park in Germany (Felson and Pickett 2005). However, only limited information is available about project performance and time- frames for project completion (Oh et al. 2014). Acknowledgments. 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