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Sep 8, 2008 | 21
If mimicking a massive volcanic eruption by spraying sulfur dioxide into the air or flying thousands of mirrors into space to shade Earth to halt climate change doesn't cut it for you, how about this? A fleet of 1,500 automated ships, dubbed "albedo yachts," spewing saltwater into the sky to make denser clouds that reflect more sunlight—and cool the world.
Atmospheric physicist John Latham of the National Center for Atmospheric Research in Boulder, Colo., and a host of British colleagues propose that a such a battalion—total tab at least $2.6 billion—would ply the world's oceans thickening clouds as they went. The idea—minus the ships to accomplish it—was first proposed by Latham in 1990 and has popped up with new details every couple of years since.
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