"… you wanted a dust mask you could request it, but it wasn’t mandatory.”Manganese poisoning is hardly a new concern. In a 1932 German paper, industrial doct …"

"… industrial-safety handbook warning of the metal’s paralyzing effects. “Manganese victims usually remain life-long cripples, unfit for gainful employment,� …"

"… manufacturers have zeroed in on the concept of “safe exposure limits.” Manganese is toxic, they’ve acknowledged, but not at the levels present in their p …"