If one makes a Search: Diatomite and silicosis, one finds numerous warnings
by different U.S. govt. agencies on the dangers of diatomite and
diatomaceous earth.Some people use diatomaceous earth as a bug killer
thinking that it is not dangerous, like chemical pesticides. Masks, gloves
and body covering are needed. Even workers handling bags of perlite are
required to wear masks.
Ed Cormier