They war-gamed dimming the Sun. It went even worse than you think. (opens in a new tab)

arstechnica.com · 2026-10-13

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They war-gamed dimming the Sun. It went even worse than you think.

arstechnica.com · 2026-10-13

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Comprehensive report: Negotiating solar radiation modification governance: evidence from non-ideal simulations
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Claim 1 of 4Not checkedA war game in London tested how the world might respond to solar radiation modification, a set of technologies meant to cool the planet by reflecting sunlight away from Earth.View evidenceHide evidence

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Claim 2 of 4Not checkedParticipants from governments, the military, science, NGOs, and tech companies struggled to agree on rules for research and governance, and distrust pushed the simulation toward breakdown rather than cooperation.View evidenceHide evidence

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Claim 3 of 4Not checkedThe simulation suggested that strategic competition, state sovereignty, and suspicions of rival programs could drive a solar-geoengineering arms race more than climate concerns could restrain it.View evidenceHide evidence

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Claim 4 of 4Not checkedThe organizers concluded that no deal was reached in the game, while fossil-fuel interests and major producing countries were portrayed as having incentives to reduce barriers to solar geoengineering development.View evidenceHide evidence

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