21 Institutionalise citizen science at the local level, e.g., by adding it as an approach in strategic documents and policies or by setting up a citizen science office at the municipality, which works with communities, universities, and projects for co-creating local initiatives, and providing spaces for stakeholder interactions. Consider combining citizen science and Urban Living Labs to achieve better policy impact. Such an approach can enable exchange between public and private sector actors, create a better picture of problems (e.g., based on citizen-generated data) and solutions, and save resources for cities. Improve coordination among citizen science initiatives at different governance and thematic levels. P C P C B P C Mainstream citizen science 3 1 2 The Barcelona Citizen Science Office Example 1: The Barcelona Citizen Science Office Established in 2012, the Barcelona Office of Citizen Science’s mission is to support citizen science in the city of Barcelona (Spain). Since its creation, the office has advised, accompanied, and promoted citizen science projects active in the city and its Metropolitan Area resulting in the involvement of around 13,000 residents and schoolchildren, who have collected more than 10,000 valuable data for scientific research. This is one of the few examples of citizen science structures at local level in Europe. The office plays a key role in connecting the public administration and local initiatives, along with researchers, and new civic and cultural agents, while providing services such as dissemination of activities and promotion of spaces for mutual learning. See the full project