Reconstructions of paleo-CO2 levels openly rely on data derived from plant stomata. But when modern (1800s-present) CO2 measurements from stomata conflict with the narrative that humans drive CO2 levels, they are patently rejected. [emphasis, links added] Scientists readily acknowledge plant stomata evidence from one location is “widely used as an effective tool for paleoenvironmental reconstructions” of global atmospheric CO2 from 1 to 150 million years ago (Badihagh et al., 2024). For example, in a new study, 100-150 million-year-old stomata samples from Iran are shown to reconfirm that global atmospheric CO2 levels hit 1,100 to 1,700 ppm during the Jurassic period....
