The Guardian reports, after the devastation of Sandy, which may have caused $30 billion in damages, a radical geo-engineering idea by scientist Professor Stephen Salter, backed by Bill Gates and Nathan Myhrvold is drawing some attention again. Developed after the last major US Hurricane-related tragedy, Katrina, which struck New Orleans and caused an estimated $81 billion damage, the Salter Sink is beautiful in its simplicity, using hundreds of 100m (300feet) long tubes held up by old car tyres and the natural action of waves to mix warm surface water, the main driver of hurricanes, with cool deep sea water. Each degree centigrade of difference can drop a hurricane by one scale, from scale 5 to scale 4 for example, and if surface temperature can be dropped below 26.5 degrees hurricanes can not form at all. "If you can cool the sea surface, you would calm the hurricanes. I estimate you ...

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