Climi di opinione. Cornici di verità del cambiamento climatico su Facebook in Italia

The article analyses how epistemic authority on climate change is con-structed and contested within the Italian Facebook publics. Starting from 108 false news items about climate change debunked by the main Italian fact-checkers between 2021 and 2022, we collected 2,623 Italian-language posts that express an explicit stance on the issue. A first quantitative analysis maps the distribution of skeptical and pro-consensus content; a second qualitative analysis reconstructs two dimensions: the framing of expertise and the proce-dures through which credible facts are constructed. The results show a limited circulation of fact-checking content and a cross-cutting use of personal expe-rience as evidence. They also reveal a key divergence between the two pub-lics: while pro-consensus actors tend to treat Facebook as a space for circulat-ing and defending scientific knowledge, skeptical actors often frame the plat-form itself as a legitimate site for producing alternative evidence and truth claims.