I ngā tau tata nei, kua noho ko ngā tukunga VOC (Volatile Organic Compounds) hei pokapū matua mō te parahanga o te hau o te ao. Ko te rehu paura hiko he momo hangarau maimoatanga mata hou, kāore he tukunga VOC, he penapena pūngao, he tiaki taiao hoki, ā, ka whakataetae haere ki te hangarau peita tuku iho i taua taumata anō.
Ko te mātāpono o te rehu paura hiko-pūmau ko te whakakī i te paura e te whakakī hiko-pūmau ka piri ki te mea mahi.
Ki te whakatauritea ki te hangarau peita tuku iho, e rua ngā painga o te rehu paura: kāore he tukunga VOC, kāore hoki he para totoka. He nui ake ngā tukunga VOC ka puta mai i te peita rehu, ā, tuarua, ki te kore te peita e tau ki te mea mahi, ā, ka taka ki te whenua, ka noho hei para totoka, ā, kāore e taea te whakamahi. Ka taea e te rehu paura te 95% neke atu rānei. I taua wā anō, he tino pai te mahi a te rehu paura, ehara i te mea ka taea anake te whakatutuki i ngā whakaritenga katoa o te peita rehu, engari he pai ake ētahi tohu i te peita rehu. Nō reira, ā muri ake nei, ka whai wāhi te rehu paura ki te whakatutuki i te tirohanga o te kore waro i te tihi.
