Commentary Missing from most, if not all, coverage of last month’s climate science report from the United Nations Intergovernmental Panel on Climate Change (IPCC) was the fact that their most important conclusions are impossible—not merely contested or exaggerated, but literally impossible. Consider the following from the IPCC full Working Group I report, “Climate Change 2021: The Physical Science Basis,” issued on Aug. 9: “Warming of the climate system is unequivocal, as is now evident from observations of increases in global average air and ocean temperatures, widespread melting of snow and ice, and rising global average sea level.” It is obviously a mistake to refer to “global average air and ocean temperatures … and global average sea level” as “observations.” They are the results of statistical manipulations of thousands of observations in different places and at different times. But more significantly, the idea that any of the science conclusions of the …