The modern industrialized society exposes children as well as adults to environmental hazards ranging from solvents in the home to industrial pollution. Civil catastrophes like the Union Carbides gas leakage in India, fires in plastic industries, and accidents when transporting chemical products has much in common with chemical warfare. The effects on humans and pro-tection against these effects are very much the same, namely respiratory protective devices (RPD). This paper has been submitted for presentation at lAPS-b Technical University Delft, The Netherlands. The study which it reports was financially supported by grant to the second author from the Civil Defense Department in Sweden.