If a cloud and had a cold cloud one machine. When the cloud top development at all levels, higher 20 000 feet go to attack by shooting fireworks chemicals, silver iodide (Agl) into the peak of cloud. At an altitude of about, 21500 feet, which are temperature between - 8 to 12 degrees Celsius. The currents of air flow, the higher 1000 feet per minute, and were not in freezing cold water over 1 grams per cubic meter, which is suitable for the conditions of Agl particles will serve as an axis for freezing. (Ice Nuclei) and when in contact with water beads arranged in blind clouds.Such heat energy which will be pushed, cloud top grow higher. And induction of moist air into the cloud base increases. At the same time, remove water becomes ice. A surface vapor pressure than the granular cold waterAnd granular ice will grow faster in the ice with weight increase. And will fall down to the bottom, which will dissolve a grain rain. When passing through freezing temperature down at the base of the cloud. And as it rained down to the ground.
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