↑ IPCC, “Summary for Policymakers” (PDF), Detection and Attribution of Climate Change, «It is extremely likely that human influence has been the dominant cause of the observed warming since the mid-20th century» (page 17) and «In this Summary for Policymakers, the following terms have been used to indicate the assessed likelihood of an outcome or a result: (...) extremely likely: 95–100%» (page 2). , in IPCC AR5 WG1 2013.
↑ [Notes-SciPanel] America's Climate Choices: Panel on Advancing the Science of Climate Change; National Research Council (2010). Advancing the Science of Climate Change. Washington, D.C.: The National Academies Press. ISBN0-309-14588-0. Bản gốc lưu trữ ngày 29 tháng 5 năm 2014. (p1)... there is a strong, credible body of evidence, based on multiple lines of research, documenting that climate is changing and that these changes are in large part caused by human activities. While much remains to be learned, the core phenomenon, scientific questions, and hypotheses have been examined thoroughly and have stood firm in the face of serious scientific debate and careful evaluation of alternative explanations. * * * (p21-22) Some scientific conclusions or theories have been so thoroughly examined and tested, and supported by so many independent observations and results, that their likelihood of subsequently being found to be wrong is vanishingly small. Such conclusions and theories are then regarded as settled facts. This is the case for the conclusions that the Earth system is warming and that much of this warming is very likely due to human activities.
Climate Change Science: An Analysis of Some Key Questions. A report by the Committee on the Science of Climate Change, US National Research Council (NRC), 2001
