Meh....a story about nothing
zinc cadmium sulfide is simply not toxic. It was used many times by our military to SIMULATE a chemical attack on this country. It is easy to track because its florescent.

Also interesting enough for the chemtards of this site. In the 50s, the military tested this by trying to spray zinc cadmium sulfide all over the country from planes. Unfortunately the experiment failed, because when things are sprayed from planes from those altitudes, the chemicals are carried 1000s of miles away before they fall. Most ended up in Canada, the Atlantic Ocean and Gulf of mexico