A growing number of people is coming to live and work in cities, that now host more than 50% of the human population. Solutions to better handle this process are mandatory to ensure the wellbeing of citizens. In the environmental field, urban green infrastructures play a vital role as providers of Ecosystem Services. The more complex and structured urban green areas are, the more important their functions are. A purely aesthetic vision of green, as urban furniture, changes to a productive one, where green infrastructures provide benefits and Naturebased Solutions. Urban green infrastructures can be integrated into multifunctional ecological network, modelled on wider natural park networks at regional level, but with a special focus in people wellbeing. The procedure to develop a feasibility plan for an urban ecological network and some practical examples are here described. To promote this vision, new forms of exchange are emerging, such as PES (Payment for Ecosystem Services), that can be effective natural resources management tool that allows to internalize environmental costs and benefits in the decision-making process, while preserving the landscape and the environment. Assigning a value to the various Ecosystem Services is therefore an essential tool for policy makers, planners, investors and ordinary citizens, so being able to choose between different options in an aware way. A review of different methods to evaluate the Ecosystem Services provided by the various urban green typologies are illustrated with a wide bibliography.
Keywords: Ecosystem services, urban ecological networks, TEV.
Jel Code: Q57, Q26, H23