Tweak the Weather? Cloud Seeding Aims To
17 October 2007 | Weather on NBCNEWS.com | Associated Press
Insurers among those paying to produce rain, reduce hail or make snow
The Kansas program is among about 10 that tinker with the weather — either by trying to cut the size of hail or boost rainfall and snowpack. They do it largely by shooting up storm clouds with silver iodide.