Phys.org  December 23, 2024 Decisions about solar geoengineering (SG) entail risk–risk tradeoffs between the direct risks of SG and SG’s ability to reduce climate risks. Quantitative comparisons between these risks are needed to inform public policy. A team of researchers in the US (Georgia Institute of Technology, Princeton University, University of Chicago) evaluated SG’s effectiveness in reducing deaths from warming. They found that temperature-attributable mortality is uneven with decreases for hotter, poorer regions and increases in cooler, richer regions. There was no evidence that the mortality reduction achieved by SG was smaller than the reduction from equivalent cooling by emissions […]