Overview

• Kerry McCarthy’s ministerial letter highlights the need for detailed risk assessments of third-party use of solar radiation modification techniques.
• The UK’s Advanced Research and Invention Agency is funding studies on aerosol-based sun-dimming methods while ruling out support for deployment.
• Defence analysts warn that Russia could integrate geoengineering into hybrid warfare to trigger environmental disasters and economic disruption.
• Other experts caution that the high costs and unpredictable climatic outcomes may deter states from weaponizing solar geoengineering.
• Over 550 academics have called for comprehensive international controls to prevent unilateral deployment of solar radiation modification.