Editor’s Note: This is the second in a two-part series on the case for researching the taboo concept of solar geoengineering as a potential bridge to achieving net zero emissions. Part one summarizes some concerns raised about solar engineering. This piece analyzes the use of stratospheric aerosol injection and what we need to research further if we want to know how to effectively deploy and regulate it.
Achieving net-zero emissions remains far off, and ambitions for limiting warming to less than 1.5 degrees Celsius have continued to dim, as evidenced by the most recent U.N. climate conference. As a result, interest continues to grow in exploring geoengineering as a potential way to mitigate climate impacts. For reasons we explain below, however, it is likely that a decade or more of further research is needed before geoengineering deployment could be realistically considered. Moreover, this research could show that the technology is not w
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