whakaahuatanga hua:
Ko te mata wiri rua he taputapu tirotiro maroke motuhake mō ngā matūriki iti me ngā rauemi piri maku (pērā i te waro mata, te lignite, te paru, te bauxite, te coke me ētahi atu rauemi piri maku), inā koa mēnā he ngāwari te ārai i te mata, ka taea e te mata wiri rua te whakatutuki i te pai o te tirotiro me te iti o te wāhi mata, ā, ka kore e āraia ngā kōhao e te mata. He whānuitia te whakamahinga o tēnei taputapu i roto i te waro, te ahumahi matū waro, te hiko, te Coke, te whakarewa, ngā rauemi hanga me ētahi atu ahumahi.