Mā te to tatou hangarau i roto i te whāngai, me te kai ahumahi. E mea pinepine wā, ina whakaaro koe o te tukanga beneficiation hiko, ko ngā mātā e tīmata ana ki te hinengaro, ko ngā hua tinana pēnei i te

He nui ake i te ngārehu o to rere ki te awa. I runga i tētahi tirohanga whakapānga e pā ana ki te Amerikana Ngārehu Waro (ACAA) i waenganui i 1966 a 2011, neke atu i te 2.3 piri poto