## 4 Conclusions  
Science outreach projects usually aim to raise awareness of scientific research activities, educating students on topics that could potentially inspire their professional careers. RadioLab is an INFN project which, over the years, has contributed to spreading knowledge on the issues of natural environmental radioactivity, in particular on exposure to radon gas, actively involving high school students. This activity translates into seminars by expert researchers in the field, workshops, measurements, data processing, and so on. The didactic approach has allowed and promoted cooperation between different learning contexts (schools-universities), contributing to the acquisition of key skills that are necessary for the individual's integration into society. In this work, it has been demonstrated that educational activities can also be useful for scientific purposes. The students were guided by the researchers in experimental activity and in output elaboration, while retaining a certain autonomy required with the study and deepening knowledge of the topic. Annual measurements of radon gas activity concentration were made in 67 schools distributed throughout the Campania region using LR115 passive detectors. The results obtained contributed to an improvement in the collection of data relating to the concentration of radon gas activity in the Campania region. The mapping of the territory is one of the milestones of the National Radon Plan, planned by the Italian legislation, which has the aim to identify the \"radon prone areas\" and so to define specific radiation protection actions. In addition, these results had a two-fold purpose: (i) to educate students on the rigor of research in order to obtain reliable results; and (ii) to contribute to providing data for the radiological characterization of territory. The quality of these data is even more amplified by the intended use of buildings that were selected for monitoring: schools. Although they are not places where radon measurement is mandatory, they represent one of the few places where the exposure is greater for children/teenagers, who constitute the most radiosensitive part of the population. RadioLab's outlook could be to increase the network of schools involved in the outreach activity and in the realization of experimental activities with applicative effects in the scientific and research sectors. Conceptualization, G.L.V., F.A., M.R. and M.P. ; Methodology, G.L.V., F.A., M.R. and M.P. ; Software, G.L.V., F.A., M.R. and M.P. ; Validation, G.L.V., F.A., M.R. and M.P. ; Formal analysis, G.L.V., F.A., M.R. and M.P. ; Investigation, G.L.V., F.A., M.R. and M.P. ; Resources, G.L.V., F.A., M.R. and M.P. ; Data curation, G.L.V., F.A., M.R. and M.P. ; Writing--original draft, G.L.V., F.A., M.R. and M.P. ; Writing--review & editing, G.L.V., F.A., M.R. and M.P. ; Visualization, G.L.V., F.A., M.R. and M.P. ; Supervision, G.L.V., F.A., M.R. and M.P. ; Project administration, G.L.V., F.A., M.R. and M.P. ; Funding acquisition, G.L.V., F.A., M.R. and M.P. All authors have read and agreed to the published version of the manuscript. This work was supported by INFN's RadioLab project. Institutional Review Board Statement: Not applicable. Informed Consent Statement: Not applicable. Data Availability Statement: The data will be available on request. Acknowledgments: The authors would like to thank the schools involved in the RadioLab project. Conflicts of Interest: The authors declare no conflict of interest. References  
United States Environmental Protection Agency (US EPA). Assessment of Risk from Radon in Homes; United States Environmental Protection Agency: Washington, DC, USA, 2003; EPA 402-R-03-003 (2003). International Agency for Research on Cancer (IARC). IARC Monographs on the Evaluation of Carcinogenic Risks to Humans. World Health Organ. **1988**, _43_, 173-259. United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR). Sources, effects and risks of ionizing radiation.