Kasa naʻe faʻu ʻe he ʻea fakamafana valitaa

Emits e ngaahi kasa vela predominantly faʻu ʻaki ha ngaahi hydrocarbons kehekehe, tautautefito polycyclic aromatic hydrocarbons.

ʻOku kau ʻi he taʻanga ʻa e valitaa ʻa e valitaa, resins, ʻa e aromatic hydrocarbons.

Koeʻuhi ko e faitoʻo ʻo e ʻea maʻolunga pe ko e ʻea ʻo e ʻea fakanatula, lolo fokotuʻu, mo e valitaa malalá, ʻOku ʻomi ʻe he founga fakamafana ha fanga kiʻi meʻa molecular iiki, ʻa e seini loloa mo aromatic hydrocarbons, molecules mahuʻinga hange ko e naphthalene, anthracene, phenanthrene, mo benzo[a]pyrene.

Polycyclic aromatic hydrocarbons ʻoku fuʻu kona pea ʻoku ʻiloa ha niʻihi carcinogens.