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.