## 4 Results and Discussion  
The proposed methodology allows the development of user-friendly tools that can be directly used by citizens, and, from a citizen's scientific perspective, facilitates the communication of the hazards associated with radon exposure, and, at the same time, pushes the citizen towards an increased radon-related literacy by broadening the scientific awareness of the public opinion. The implementation of the proposed methodology allowsthe design of a pre-diagnosis radon potential model, as depicted in Figure 2, with the three following main features:  
* Decision-making tool: can be applied in a preliminary stage when projecting new buildings. Additionally, this tool can be helpful to assess the need of carrying out in situ experimental campaigns in existing buildings located in regions with high radon potential, or locations with medium radon potential, but where the combination of other factors can also justify in situ experimental campaigns for on-site radon measurements. * Pre-diagnosis assessment tool: by using radon potential maps as a starting point, but also by establishing the analysis of other relevant criteria, such as the indoor occupancy rates. The rate of occupation of indoor spaces is crucial to assess the need to implement remediation measures since these are only considered necessary when human occupancy is considered. The correlation between indoor radon concentration and the time spent indoors (exposure time) will define the daily exposure dose, and can also be easily determined, for example, using the methodology presented by [PERSON] et al. (2021) [70]. * Radon literacy tool: by using a WebGIS-based platform designed to provide a prompt preliminary assessment to check the probability of the occurrence of high indoor radon concentrations, justifying, therefore, the adoption of measures, whether preventive or corrective, to maintain radon concentrations within the recommended threshold values. As shown in the flowchart in Figure 2, users, through a user-friendly platform, are asked to provide throughout a WebGIS-based platform the necessary data so that the pre-diagnosis model can compute the indoor radon occurrence probability (qualitatively, though, for example, the indication of a LOW, MEDIUM or HIGH radon potential), which, together with information of the building construction characteristics and with the human occupancy profile, determines the radon potential level and advises on the procedure to be followed. That is, in the case when radon potential is estimated as LOW, the ICT platform informs the user that no further action needs to be taken, for example, testing in the case of existing buildings, or in the case of a new projected one, it may not be necessary to contemplate additional measures, no more than the recommendations already required by the legislation in force. Conversely, in cases when the user receives information indicating a HIGH potential level, the user is advised to carry out an assessment study to confirm the situation and to allow the adoption of preventive or corrective measures, depending on the  
Figure 2: Implementation of a pre-diagnosis tool for indoor radon potential assessment. stage in which the situation is. In the case in which the user receives information indicating a MEDIUM potential level, the counseling should be based on an assessment that allows for the dissipation of doubts and always towards the identification of false positives, trying to eliminate any probability of the occurrence of false negatives. Based on the approach depicted in Figure 2, the radon potential evaluation was designed according to the architecture presented in Figure 3. This platform offers a very user-friendly interface that delivers the features previously described.