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Artificial rain is made by spraying salt...

Artificial rain is made by spraying salt over clouds, why ?

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Artifical rain: Cloud consists of charge particle of water disperse in air. Rain is caused by aggregation of these minute particles, artifical rain can be done by throwing electrified sand or Agl from aeroplanes, colloidal `H_(2)O` particle present in cloud will get coagulated by these sand or Agl particles to form bigger water drops causing rain.
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