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9 not-so-crazy ideas to combat climate change

By: Bryan Nelson on March 8, 2010, 11:01 a.m.
Cloud-making ships

Photo: John MacNeill

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Cloud-making ships

Puffy, white, low-flying clouds reflect a lot of sunlight, leading a few scientists to suggest making more of them. The best way to do that, according to some, would be to spray seawater high into the sky using specialized ships designed to patrol the oceans. John Latham, a proponent of the idea, thinks it will take a fleet of about 1,500 such ships to do the job correctly.