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Public perception of global climate change is strongly influenced by media constructions of scientific knowledge. This paper explores recent scientific findings and the press coverage thereof and is based on a content analysis of two years of global reporting on climate related positive feedback mechanisms (climate system responses to global warming which lead to further warming). Results indicate that non-US news organizations, especially in the UK, are at the forefront of the discourse on climate feedback loops. Poor US press coverage on such climate thresholds might be understood not only as self-censorship, but as a &#34;false negative&#34; error.