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Explore a 20-minute talk by Miranda Hack from the V Faye McNeill Group examining the practical limitations of stratospheric aerosol injection (SAI) strategies for climate intervention. Learn how high-altitude aerosols can potentially lower global temperatures by backscattering shortwave radiation, similar to what occurs after volcanic eruptions. Discover why solid mineral candidates have been proposed as alternatives to sulfate SAI to reduce risks of ozone depletion and stratospheric heating. The presentation delves into both macroscopic factors (geography, governance, supply chains) and microscopic considerations (dispersal methods, injection technology) that influence aerosol properties and effectiveness. Understand how technical, geopolitical, and economic constraints ultimately determine the feasibility and risk profile of different SAI strategies. This talk is part of the Simons Foundation's Solar Radiation Management Annual Meeting 2025.
