Ibhokisi yokulawula okuphathelene nezindawo ezilawulayo ezifakwe kuzo izinhlobo zezinhlamvu nezinhlanzi ezifakwe kuzo, amanzi amathathu, isikhumba, noma izimpawu. Kuyinto enkulu ukuthi kuyisebenziseka ukulawula futhi ukulondoloza izinhlelo zezinhlamvu ukuze kungaphumeleli izimpawu zokulwa. Leli bhokisi lokulawula libhekene nesimo sekarboni, elinamandla okwesikhashana nesikhungo, futhi lingathola izinhlamvu ezithile noma izinhlamvu, kungakwazi ukulawula isimo sebhokisi lokulawula kuzo izindawo ezikhali kahle.