The webinar was organised by the Pella Education Districts (in Northern Greece) in collaboration with the Environmental Educational Lab (EEL-NKUA) on 05.04.2022. The NKUA team participated with three presentations: a) "Environmental Education for Sustainability and Citizen Science: Empowering students to become active citizens in their schools and communities" (Maria Daskolia); b) "Digital Citizenship for the environment and sustainability with the Cos4Cloud Citizen Observatories" (Dimitris Gkotzos); and c) "From school to neighbourhood and the community. Ideas for doing environmental education for sustainability using the Cos4Cloud citizen observatories" (Matrona Pappa, Menia Daskalaki, Anna Trigatzi). The webinar was attended by 200 teachers. The dissemination of the event is available  here.