I te wā e whiriwhiri ana i ngā rivet kowiri tira, me pēhea te whakatau ko tēhea momo kowiri tira hei whakamahi?

He pai te maitai kore waikura 1.201 mō te whakamahi i te taiao maroke, ā, he ngāwari ki te waikura mēnā ka pāngia e te wai.

2.304 he kowiri tira, he pai mō te taiao o waho, o te taiao makuku rānei, he kaha te ātete ki te waikura me te waikawa.

3.316 te kowiri tira, i tāpirihia te molybdenum, he ātete ki te waikura me te waikura pakaru, he tino pai mō te wai moana, ngā matū rānei.