Climate Change Is Erased From a Manual for Federal Judges

The Federal Judicial Center and the National Academies of Sciences, Engineering, and Medicine recently removed a comprehensive chapter on climate science from the forthcoming edition of the 'Reference Manual on Scientific Evidence' in Washington, D.C., following intense political pressure from Republican lawmakers. The decision to excise the section, which was intended to guide federal judges through complex environmental litigation, came after GOP members of the House Committee on Science, Space, and Technology questioned the impartiality of the contributing authors and the necessity of the topic. This manual serves as the primary resource for judges tasked with determining the admissibility of expert testimony in federal courts across the United States. The removal of the chapter marks a significant departure from the original plan for the manual’s fourth edition, which sought to address the increasing volume of climate-related lawsuits reaching federal dockets. Critics of the decision argue that by removing standardized scientific guidance, the judicial system risks inconsistent rulings on climate liability, regulatory disputes, and carbon emission standards. The controversy centered on allegations from conservative politicians that the included climate science was 'policy-driven' rather than purely objective, leading to a standoff that ultimately resulted in the total withdrawal of the material to avoid further legislative scrutiny. Legal experts and environmental advocates have expressed concern that this omission leaves a vacuum of vetted information just as legal challenges against major energy producers and government environmental policies are surging. While the manual still covers foundational scientific principles such as DNA evidence and statistics, the absence of a dedicated climate framework means judges will have to rely on adversarial expert testimony without a neutral, peer-reviewed baseline provided by the National Academies. This development highlights the growing intersection of partisan politics and the technical administration of the American judicial system.