Tuhia he tomokanga mō tēnei wāhanga - Kua waihangahia e te taenga mai o te iwi tangata he whai wāhitanga mō ngā rauropi ki te rere i runga i ngā mea hanga e rere ana, tērā pea he roa ake i ngā mea rere tūturu. I kitea tēnei āhuatanga i muri i te 2011 Tōhoku tsunami
i Hapani, tata ki te 300 nga momo i kitea kua kawea e te North Pacific Current ki te takutai hauauru o Amerika ki te Raki (ahakoa kaore ano kia kitea he koroni i tenei wa).