Alava tioata o se ituaiga o mea nonmetal nonmetal ma faatinoga sili ona lelei, lea ei ai le tele o talosaga.O loʻo manaʻomia le alava tioata i lalo e aofia ai mea faufale, felauaiga (taavale, ma isi), mea tau alamanuia, mea tau eletise (PCB) ma le malosi o le matagi, faʻamaumauga mo le 34%, 27%, 1...
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