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

Explain the following: Artificial rain is caused by spraying salt over clouds.

Explain the following Artificial rain is caused by spraying salt over clouds.

Explain the following : (a) Same substance can act both as colloids and crystalloids. (b) Artificial rain is caused by spraying salt over clouds.

Explain the following : (a) Same substance can act both as colloids and crystalloids. (b) Artificial rain is caused by spraying salt over clouds.

Artifical rain is caused by spraying :

Artifical rain is caused by spraying :

Artifical rain is caused by spraying :

Artificial rain is caused by spray of

How does it become possible to cause artificial rain by spraying silver iodide on clouds ?