He mea hanga ki te anga ma, kanapa, he anga pūtoru, he ngohengohe, he ngāwari te whakarewa, ko tōna tuarua anake ko te koura, he pai rawa atu te kawe wera me te hiko; kāore e tauhohe ki te wai me te hāora o te āhuarangi, ā, ka mangu ina pāngia e te ozone, te hauwai whanariki me te whanariki; kāore e ngoikore ki te nuinga o ngā waikawa, ā, ka tere te memeha i roto i te waikawa hauota waimeha me te waikawa whanariki wera kukū. Ka taea e te waikawa hauwai te waikura i te mata, ka memeha i roto i te hauwai waikawa kawakawa rewa, te peroxide kawakawa me te kawakawa cyanide i te rangi, i te aroaro rānei o te hāora; he tairongo te nuinga o ngā tote hiriwa ki te mārama, ā, kāore e memeha i roto i te maha o ngā waikawa.