finding 14.4 : key-finding-14-4

Further assessments of the technical feasibilities, costs, risks, co-benefits, and governance challenges of climate intervention or geoengineering strategies, which are as yet unproven at scale, are a necessary step before judgments about the benefits and risks of these approaches can be made with high confidence. (High confidence)

This finding is from chapter 14 of Climate Science Special Report: The Fourth National Climate Assessment: Volume I.

Process for developing key messages: The key finding is a qualitative statement based on the growing literature on this topic. The uncertainty moving forward is the comfort level and desire among numerous stakeholders to research and potentially carry out these climate intervention strategies, particularly in light of how progress by the global community to reduce GHG emissions is perceived.

Description of evidence base: Key Finding 4 contains qualitative statements based on the growing literature addressing this topic, including from such bodies as the National Academy of Sciences and the Royal Society, coupled with judgment by the authors about the future interest level in this topic.

New information and remaining uncertainties: The major uncertainty is how public perception and interest among policymakers in climate intervention may change over time, even independently from the perceived level of progress made towards reducing CO2 and other GHG emissions over time.

Assessment of confidence based on evidence: There is high confidence that climate intervention strategies may gain greater attention, especially if efforts to slow the buildup of atmospheric CO2 and other GHGs are considered inadequate by many in the scientific and policy communities.

This finding was derived from figure -.2: Confidence / Likelihood

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