Rangarira ndima iri pasi apa uye ipapo pindura mubvunzo gare gare mumutauro mumwe chetewo sechikamu:  Passage: Njodzi yeHawks Nest Tunnel yakaitika pakati pa1927 na1932 muWest Virginia mugero wepurojekiti wakatungamirirwa neUnion Carbide. Paivakwa mugero wacho, vashandi vakawana silica uye vakakumbirwa kuichera kuti ishandiswe kugadzira simbi. Vashandi vacho havana kupiwa masiki kana midziyo yokufema kuti vashandise vachikuya. Nokuda kwokutapurwa neguruva re silica, vashandi vakawanda vakava nesilicosis, chirwere chemapapu chinopedza simba. Maererano nechiratidzo chiri panzvimbo yacho, paiva norufu 109 rwakagamuchirwa. Kunzwa kwedare reCongress kwakaisa chiverengero chavakafa pa 476.  Mubvunzo: Chii chakaita kuti guruva resirivha riuraye vashandi vomumugodhi?
vashandi havana kupiwa masiki kana midziyo yekufema