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David Keith’s unusual climate change idea
David Keith   Nov 19, 2012   TED  

“Environmental scientist David Keith talks about a cheap, effective, shocking solution to climate change: What if we injected a huge cloud of particles into the atmosphere, to deflect sunlight and heat? As an emergency measure to slow a melting ice cap, it could work. Keith discusses why geo-engineering like this is a good idea, why it’s a terrible one — and who, despite the cost, might be tempted to use it. (Recorded September 2007 in New York City. Duration: 16:04.)”

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