1. Osisi pine na-ebubata
2. Ọnụ ego dị elu
3. Nchekwa gburugburu ebe obibi na-enweghị formaldehyde
4. mkpuchi mkpuchi mmiri
Nnwere onwe na nke pụrụ iche n'akụkụ oghere imeghe nwere ike igbochi nwamba eletriki naanị ite ájá. Ọ bụ ikpo okwu osisi sara mbara nke ukwuu ma nwee ohere ọrụ ka ukwuu.
Izute nwamba mgbe ị na-eri nri, na-aṅụ ihe ọṅụṅụ, na-ekpori ndụ, na-eme ka ndụ gị dịkwuo mma. Ezigbo efere osisi siri ike, na-agbakwunyeghị formaldehyde, nwamba ahụ zuru ike. Igwe ikuku bombu dị elu na-eji na villa na ezigbo ikuku. Mgbasa ikuku na-adị ngwa ngwa, ọ bụghị na-agbaze, ọ dịghị nje bacteria. Ihe mkpuchi mmiri pụrụ iche, enweghị formaldehyde, enweghị isi, anyị nwere ike ihicha ya ngwa ngwa, ọdịdị ahụ dịkwa mma.