Selvom en lille håndfuld af de adspurgte eksperter er optimistiske, forventer langt hovedparten, at 1,5-graders målet vil blive markant overskredet:”Almost 80% of the respondents, all from the authoritative Intergovernmental Panel on Climate Change (IPCC), foresee at least 2.5C of global heating, while almost half anticipate at least 3C (5.4F).