Isiqhoboshi semibhobho yemoto sisixhobo esincinci kodwa esibalulekileyo senkqubo yemibhobho yesithuthi, enoxanduva lokubamba ngokukhuselekileyo imigca yamanzi kwindawo.Ezi zibophelelo zenziwa ngemathiriyeli ekumgangatho ophezulu, njengeplastiki okanye isinyithi, kwaye ziyilelwe ukuba zimelane neemeko ezinzima zekhompatimenti ye-injini.