Gold Standard of Certainty Reached Regarding Humans’ Link to Climate Change

Upon review and reanalysis of these events by a team of scientists, they concluded that the first two events reached a “five sigma” level of certainty

2019 marks the 40th anniversary of three major events in the climate science community: the release of the Charney report on carbon dioxide and climate change by the US National Academy of Sciences, the release of the Hasselman report which is “considered the first serious effort to provide a statistical framework for identifying a human-caused global warming signal,” and the beginning of National Oceanic and Atmos