https://www.sciencedirect.com/science/article/pii/S0921800922003093Benjamin K.Sovacoolabc <https://www.sciencedirect.com/science/article/pii/S0921800922003093#!>Sean Lowa <https://www.sciencedirect.com/science/article/pii/S0921800922003093#!> Abstract The scientific literature on the co-impacts of low-carbon energy systems—positive and negative side effects—has focused intently on climate mitigation, or climate adaptation. It has not systematically examined the prospective co-impacts of carbon removal (or negative emissions) and solar geoengineering. Based on a large sample of diverse expert interviews (N = 125), and using a sociotechnical approach, in this study we identify 107 perceived co-impacts related to the deployment of carbon removal and solar geoengineering technologies. Slightly less than half (52) were identified as positive co-impacts (38 for carbon removal, 14 for solar geoengineering), whereas slightly more than half (55) were identified as negative co-impacts (31 for carbon removal, 24 for solar geoengineering). We then discuss 20 of these co-impacts in more depth, including positive co-impacts for nature-based protection, the expansion of industry, and reduction of poverty or heat stress as well as negative co-impacts for water insecurity, moral hazard, limited social acceptance and path dependence. After presenting this body of evidence, the paper then discusses and theorizes these co-impacts more deeply in terms of four areas: relationality and risk-risk trade-offs, co-deployment and coupling, intentional or unintentional implications, and expert consensus and dissensus. It concludes with more general insights for energy and climate research, and policy.
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