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Today's Topic
For a decade, Canadian physicist David Keith has led the effort to explore the controversial idea of geoengineering, the deliberate tinkering of the planet to curb the effects of climate change. Ideas have ranged from sucking carbon dioxide out of the atmosphere to seeding Earth’s stratosphere with sunlight-blocking particles. How practical are such approaches? What are the geopolitical implications? And what are the risks of these approaches compared to staying on our present course?
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Today's Guest
David Keith
Moderator
Eli Kintisch
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