As you know, the clouds seeding in the world is carried out in two ways; the classic method and the new methods like ionization method. The classic method is what's happening in nature, and actually adds substances such as silver iodide to the cloud, resulting in the cloud seeding and precipitation. I think that the World Meteorological Organization and scientific organizations around the world accept the classic method , but artificial ionization production is doubtful, especially as it is said that the ionization method is harmful to the environment and maybe it be a controversy like carcinogenicity Or earthquake increase.