Ubucwebe obucwebile besiliva buhlala bunabantu abaningi ngokuthengiswa okuhle, okufakwe ngegolide langempela, intengo eshibhile evela kithi enengqondo, futhi sithembisa ukusebenzisa isiliva elingu-92.5% hhayi okuqukethwe kwekhwalithi elibi noma isiliva okungaphansi kuka-92.5%.