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REINING IN THE WEATHER

机译：遏制天气

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Not far from the Dead Dog Saloon, behind a body shop on the main street of Grantsville, Utah, stands a rusting, four-foot-tall metal box. The box sits atop a tank of gaseous silver iodide that, when fired up, sends a plume downwind toward the nearby Oquirrh Mountains. Once carried up on the wind, each silver iodide crystal forms a core, or nucleus, around which water droplets collect. Since silver iodide has a crystalline structure similar to that of ice, it allows the tiny water droplets to coalesce until they are big and heavy enough to fall out of the sky, ultimately increasing snowfall between 10 and 15 percent a year. That's more water for later release across the state's thirsty desert during spring and baking summer, more water for irrigation, livestock, human consumption, and sports. It means millions of dollars in water-related revenues for the state's economy every year.
机译：犹他州Grantsville大街的一家车身修理厂后面的Dead Dog Saloon不远处，站着一个生锈的，高4英尺的金属盒子。盒子坐在一个气体碘化银罐的顶部，当点燃时，它向顺风向附近的Oquirrh山发出一缕缕烟气。一旦在风中传播，每个碘化银晶体就会形成一个核或核，水滴周围会聚集。由于碘化银的晶体结构类似于冰，因此它使微小的水滴聚结，直到它们又大又重，足以从天上掉下来，最终使降雪量每年增加10％到15％。这更多的水可以在春季和夏季烘烤期间在该州的口渴沙漠中释放，更多的水用于灌溉，牲畜，人类消费和体育活动。这意味着该州每年与水相关的收入达数百万美元。

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