I will first review the science and technology of solar geoengineering, addressing the following Q’s: how effective could it be in reducing climate risks? What new risks does it entail? What is uncertain? And, finally, how could much could uncertainty be reduced a substantial research program? I will then present a case for integrating solar geoengineering into a 4D climate policy that includes emissions cuts, carbon removal, and adaptation.
Recording of the Colloquium: