Re "Climate crisis reprieve" (Letters, April 17): Letter writer Paul Brady calls out the Intergovernmental Panel on Climate Change (IPCC) for changing its tune in its most recent report. This is patently false. By comparing numbers that are not directly comparable, he weaves a fictitious tale of the boy-who-cried wolf variety. Climate models, although not perfect, have their foundations in fundamental physical principles and have been demonstrated to reproduce observed temperature patterns over the 20th century when driven by known emissions of greenhouse gases such as carbon dioxide. What is it with nuclear physicists from the atomic age that make them especially prone to being so resistant to facts? Perhaps his love for the "biggest, smartest energy company?" Brady is partially right in one thing, however. A rapid rise in renewables is the only way in which overall energy use can decrease in the face of continued world population growth.
-- Chris Cappa, Sacramento