TREES is an online platform in the form of an interactive application. It is based on the map of Miercurea-Ciuc Municipality, where you can identify trees in public green spaces and access information about these trees. The application has a messaging function, through which users can send messages, requests for information related to a particular tree to the local municipality, which responds to these messages publicly and in turn sends messages to interested locals about planned interventions in green spaces, involving society and taking into account their observations. Thus, this platform becomes a simple and effective WatchDog tool, the reported problems and their resolution being public, anyone can check how and how quickly a problem was resolved.