Emerging risk governance for stratospheric aerosol injection as a climate management technology

Stratospheric aerosol injection (SAI) as a solar radiation management (SRM) technology may provide a cost-effective means of avoiding some of the worst impacts of climate change, being perhaps orders of magnitude less expensive than greenhouse gas emissions mitigation. At the same time, SAI technologies have deeply uncertain economic and environmental impacts and complex ethical, legal, political, and international relations ramifications....