*Cloud seeding programs typically employ the use of silver iodide*
“General Hazard/Toxicity Summary:
Hazards to fish, wildlife, and other non-human biota:
In fish and amphibian toxicity tests with 22 metals and metalloids, silver was the most toxic tested element as judged by acute LC50 values. In solution, ionic silver is extremely toxic to aquatic plants and animals. Among all tested species, the most sensitive individuals to silver were the poorly nourished and young and those exposed to low water hardness or salinity. It is emphasized that silver-induced stress syndromes vary widely among animal classes.
Published July 1, 1997
…Emissions from smelting operations, manufacture and disposal of certain photographic and electrical supplies, coal combustion, and cloud seeding are some of the anthropogenic sources of silver in the biosphere. Fallout from cloud seeding with silver iodide is not always confined to local precipitation; silver residuals have been detected several hundred kilometers downwind of seeding events.”
Scientific American 17 November 2009
Silver is one of the most toxic heavy metals.
Link To: Fish Kill: Nanosilver Mutates Fish Embryos