ScentCone writes: In hopes of disrupting small droplets of water before they are able to form into an approaching storm's fruit-damaging hail, some farmers are spending $50K+ each on sonic cannons. Like most, this New Zealand company's gear uses acetylene gas charges. The technique has a long history, but there is continued debate about its effectiveness. Nissan, though, has got their own version to protect lots full of shiny new cars.
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