Make it rain: the science behind altering the weather

Whenever humankind believes it has control over the natural world, the weather likes to prove us wrong. Storms, floods and droughts are just some of the weather patterns that can complicate or even threaten human life. We have increasingly sophisticated techniques for weather forecasting, but now scientists are looking even further: towards directly modifying the weather itself. Darrel Baumgardner, of The National Autonomous University of Mexico and Droplet Measurement Technologies, researches the intriguing technique of cloud seeding.
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