How to improve the relationship between citizens, science and politics? What role can citizen science play in defining and monitoring public policies and in designing and facilitating the transition? And how to use the data collected from citizens? During the Italian policy masterclass on 12 November 2021 in Grosseto these questions will be discussed. The event will take place within the Conference of the Italian network for Citizen Science. The masterclass is organised by the ACTION project, with the support of the Italian Citizen Science network and the EU-Citizen.Science project. The event is free with a limited number of partcipants. Register here.