ƙarancin gas da kuma kawar da ƙura
Cire ƙura da kuma kawar da gas na hayaki sune matakai masu mahimmanci a cikin kula da gurɓatar iska. Babban aikin wannan fasaha shi ne cire sulfur dioxide da ƙura daga hayaki da ake fitarwa daga tashoshin wutar lantarki ko masana'antu. Wasu abubuwa da aka yi amfani da su a wannan fannin su ne, ana amfani da ƙura da aka yi da dutse don a kawar da sulfur dioxide kuma a samu gypsum. Ta wannan hanyar, aikin cire ƙura ba kawai yana rage gurɓatar iska ba amma kuma yana juya wannan sharar zuwa samfuran amfani. An yi shi sosai a duk faɗin masana'antu kamar tashoshin wutar lantarki na kwal, samar da siminti da masana'antar narkewa. Ba wai kawai ya dace da bukatun muhalli ba ne, amma kuma yana ba da gudummawa ga rayuwa mafi tsabta da rayuwa mafi kyau ga kowa.