There is a proliferation of misinformation regarding climate change. In this project, we propose to: i) empower teachers in 4 European countries: Portugal, Spain, France and Greece to apply an innovative citizen science project in their secondary school classrooms to report, analyse and debunk fake news related to climate change; ii) foster secondary students’ digital, scientific and citizenship competences; iii) develop a scalable citizen science model that can be replicated in other contexts.