Solar Geoengineering: Geostrategic and Defence issues

Techniques and their recent developments highlight the prospect of large-scale deployment of solar geoengineering over the coming decades. It therefore seems necessary to explore the security and strategic issues raised by these techniques, which this note sets out to do in four stages: a presentation of the techniques studied and the associated natural and human risks (I); an analysis of the geostrategic and defence issues they raise (II); four hypotheses, and three prospective scenarios narrating the deployment of solar geoengineering techniques by 2050, together with recommendations for the Ministry of Defence (IV).