Science: Careful Rainmaker

When scientific rainmaking was invented in the U.S. in the late 19405, it seemed that at last man could do something about the weather. All over the world, commercial rainmakers armed themselves with Dry Ice or silver iodide, set to work seeding clouds wherever they could find local governments or groups of rain-hungry farmers willing to pay them. But over the years, not enough rain fell to support the reputation of the rainmakers. Rainmaking slipped into disrepute.

Last week a persistent scientist named Edward George Bowen was proving that rainmaking can be notably successful when conducted as a long-range program with carefully...

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