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

The study analyses how epistemic authority on climate change is constructed and contested within the Italian Facebook publics. Starting from 108 false news items about climate change debunked by Italian fact-checkers between 2021 and 2022, we collected 2,623 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 the framing of expertise and the procedures through which facts are constructed. The results show a limited circulation of fact-checking content, a cross-cutting use of personal experience as evidence, but also a key divergence between the two publics: while pro-consensus actors tend to treat Facebook as a space for circulating scientific knowledge, skeptical actors often frame the platform itself as a legitimate site for producing alternative evidence and truth claims.