cloud seeding is typically done using a compound called silver iodide (agi), which is naturally present in the environment in low concentrations and is not known to be harmful to humans, wildlife, or the environment. cloud seeding can be done from aircraft or ground-based generators.  cloud seeding has been used since the 1940s and is supported by state and agency efforts across the u.s.    _seeding cloud seeding is only one of the many ways we manipulate the weather.
United States