1, Ingusayizi wenxanxathela yezitolo, isisindo esilula, kulula ukuyihambisa nokuyigcina.I-2, isetshenziselwa kakhulu ukudlulisa okuphakathi ngokuya ngokushintsha ungqimba lwangaphakathi kanye nezinto ezihlangene.I-3, isici sokuphepha esiphezulu.
Isetshenziselwa ukumunca nokukhipha ama-hydrocarbons okushisa aphezulu, upharafini, isitshalo se-petrochemical namafutha ukusuka emkhunjini ukuya ogwini, iloli yamathangi, inqola yesitimela nokunye.
Isetshenziselwa ukumunca nokukhipha ama-hydrocarbon, izincibilikisi, upharafini ukusuka emkhunjini uye ogwini, iloli ithangi, inqola yesitimela nokunye.