Yanayin aiki na karkashin kasa koyaushe yana da rikitarwa, na'urar hakowa ta mu wacce ke motsi don taimaka muku aiki lafiya. Ya kamata a biya kulawa ta musamman ga ingancin iska a cikin kunkuntar yanayin aiki na karkashin kasa.
Ana iya amfani da na'urorin damfarar iska azaman tushen makamashin huhu, tsaftace kura, da watsa sigina, injin damfara kuma na iya samar da iskar numfashi ga ma'aikata a karkashin kasa.
