Uyini umkhumbi wokudoba?
Context:Isikebhe sokudoba yisikebhe noma umkhumbi osetshenziselwa ukudoba olwandle, noma echibini noma emfuleni. Kunezinhlobo eziningi zemikhumbi ezisetshenziselwa ukudoba kwezohwebo, okwenziwa ngezandla, nokokuzilibazisa.  Ngokwe-FAO, ngo-2004 kwakunemikhumbi yokudoba eyizigidi ezine. Ezingaba izigidi ezingu-1,3 zalezi zimikhumbi ezinemibhoshongo enezindawo ezivalekile. Cishe zonke lezi zitsha ezihamba ngomkhumbi zinemishini, futhi ezingu - 40 000 zazo zingaphezu kwamathani ayikhulu. Ngakolunye uhlangothi, izingxenye ezimbili kwezintathu (izigidi ezingu-1,8) zezikebhe ezingenamikhumbi ziyizikebhe zendabuko zezinhlobo ezihlukahlukene, ezihamba ngemikhumbi kuphela. Lezi zikebhe zisetshenziswa abadobi abancane.
Isikebhe sokudoba yisikebhe noma umkhumbi osetshenziselwa imisebenzi yokuzilibazisa noma yezohwebo njengokudoba, ukufaka amashubhu, ukuthutha noma ukuzijabulisa nje.