Citizens are experts on their municipality: they know their surroundings and have knowledge that may remain hidden from administrative bodies for some time - where there are regular conflicts in traffic, which voluntary organizations exist in an area, or where new benches may be needed. Municipalities can use various methods to encourage citizens to share such data with them. Portals with the option of entering different information on a map depending on the question - for example, on refreshment locations or the water level of local bodies of water - offer the potential to involve citizens and at the same time to make cities and municipalities more responsive to needs more swiftly. Similar functions are also offered by defect notifiers, i.e. portals or apps that citizens can use to report damage or pollution and thus help municipalities to respond more effectively.
In order to create globally sustainable structures, the member states of the United Nations have set themselves 17 goals by 2030, which are set out in the 2030 Agenda for Sustainable Development.