StarTalk Radio Changing the World (Literally)
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Apr 18, 2025 
Daniele Visioni, an assistant professor at Cornell specializing in climate intervention, and Holly Jean Buck, a sustainability expert from Harvard, join the discussion. They explore the concept of geoengineering, debating the feasibility of creating an atmospheric sun shield to combat global warming. The conversation dives into the science behind stratospheric aerosols, their environmental impacts, and ethical considerations. Visioni and Buck emphasize the need for global governance and collaboration in addressing climate change challenges while navigating the complex interplay of technology and society.
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Geoengineering as Band-Aid
- Stratospheric aerosol injection is a temporary 'Band-Aid' that can't solve climate change.
- It could prevent warming temporarily, reducing some climate risks but doesn't address greenhouse gas causes.
AI Advances Climate Research
- AI helps climate science by processing massive datasets such as satellite observations of volcanic plumes.
- Pattern recognition by AI uncovers data patterns humans struggle to detect.
Managing Geoengineering Risks
- Aerosol injection must be carefully planned with contingencies to avoid abrupt climate shock if halted.
- Aerosols remain months to a year in stratosphere, so sudden stoppage would cause delayed unmasking of warming.