You know, there is nothing secret about tries to manipulate the weather, mainly rain. Its a known technic dating back to 2nd World War (clear the skies for easier bombing runs).
It was often used by the sowjets when they had a parade. Some tries exist even today for agriculture to get rain. And it is used to prevent hailstorms.
Or to quote the english WP on silver iodide (most used stuff): "Approximately 50,000 kg are used for cloud seeding annually, each seeding experiment consuming 10–50 grams.[4]" and here is the article on the technic: https://en.wikipedia.org/wiki/Cloud_seeding
So WTF are you writing about "admits" - you can only admit what you hold secret. And somethign widely known for half a century isn't what I would call a secret.