April 19, 2021 | Idaho Legislature | AN ACT TO PROVIDE FOR CLOUD SEEDING
“cloud seeding” means all acts undertaken to artificially distribute or create nuclei in cloud masses for the purposes of inducing precipitation, cloud forms, or other meteorological parameters.”
“The act of cloud seeding pursuant to a project funded in whole or in part by the state of Idaho or authorized by the state water resource board shall not be the basis of any claim of liability, including but not limited to trespass or public or private nuisance, and shall not require any state or local permits.”
“The Idaho Water Resource Board is taking the initial steps toward expanding its longstanding cloud seeding program into new areas of the state.
On Sept. 17, the board approved a $389,000 year-long contract with Sandy, Utah-based North American Weather Consultants to launch a cloud seeding pilot program this winter on the Idaho side of the Bear River Basin…”
“…The science of cloud seeding entails emitting silver iodide vapor into the atmosphere using ground-based propane generators or dropping it from an aircraft amid a storm.
The silver iodide particles serve as nuclei on which super-cooled cloud droplets can attach, forming ice crystals that fall and become raindrops… ”
Silver Iodide: Toxic, Environmental Hazard_Link to PubChem
“The major hazards encountered in the use and handling of silver iodide stem from its toxicologic properties. Toxic by all routes (ie, inhalation, ingestion, and dermal contact), exposure to this odorless, light yellow, crystalline substance may occur from its use in seeding clouds for rain-making…”
“Very toxic to aquatic life [Warning Hazardous to the aquatic environment, acute hazard]”
“Very toxic to aquatic life with long lasting effects [Warning Hazardous to the aquatic environment, long-term hazard]”
“Silver iodide may form explosive compounds”
Link To Idaho Collaborative Cloud Seeding Program_winter_2020-21_idaho_collaborative_cloud_seeding_program_end_of_year_final_report
“The radiative effects of aerosols on clouds mostly act to suppress precipitation…”
The Opposing Effects of Aerosols on Clouds and Precipitation
“The radiative effects of aerosols on clouds mostly act to suppress precipitation, because they decrease the amount of solar radiation that reaches the land surface, and therefore cause less heat to be available for evaporating water and energizing convective rain clouds (7). The fraction of radiation that is not reflected back to space by the aerosols is absorbed into the atmosphere, mainly by carbonaceous aerosols, leading to heating of the air above the surface. This sta- bilizes the low atmosphere and suppresses the generation of convective clouds.”