Mohato oa 1: Ho hloekisa ha gase - khase e nkiloeng ea tlhaho ho tloha masimong a khase kapa liliba tsa oli li ntse li etsoa bakeng sa ho hloekisa mekhoa ea ho itlhoekisa. Metsi a tlosoa sethaleng sena, a siea motsoako oa hydrocarbon (Methane, Ethane, Propane, le joalo).