UMary Allen
Iminatha liqela lezityalo ezikhula phantse kulo lonke ihlabathi. Kuphela e-Antarctica, akukho zinambuzane. Kwiindidi ezininzi zeenethi ezihlabayo eJamani, eyona nto ixhaphakileyo yinettle enkulu kunye nenettle encinci.
Amagqabi kunye neziqu zezityalo zigqunywe ngeenwele ezihlabayo, ezijongene neentlungu kunye neengqungquthela xa ziphathwa. Kubantu abaninzi, iiminatha ezihlabayo aziyongozi, ziyalimaza nje. Iinwele ezihlabayo zenzelwe ukuthintela ukuba isityalo singatyiwa zizilwanyana. Iimopane ezimalunga nama-50 eentlobo zamabhabhathane zitya kuphela iindidi ezithile zamarhawu ahlabayo.
Iminarha isetyenziselwa ntoni?
Kwakhona, abanye abantu batya iinettle kwaye bathi incasa efana nespinatshi. Ukuba usika amarhawu ahlabayo amancinci kakhulu okanye uwagalele ngamanzi ashushu, iinwele ezihlabayo azisasebenzi. Imbewu igcadiswa ukwenza incasa ibengcono. Amagqabi omnatha owomileyo angasetyenziselwa ukwenza iti.
Iminatha nazo zityiswa izilwanyana kwezolimo. Abagadi begadi basebenzisa amanzi apho iiminatha ziye zalala khona kangangexesha elithile. Bayisebenzisela ukuchumisa nokomeleza izityalo.
Ilaphu lenziwe kwimicu yeziqu zezinye iintlobo ukusuka kwinkulungwane ye-18 ukuza kuthi ga ngoku. Iingcambu zeminatha ezihlabayo zazisetyenziselwa ukudaya amalaphu. Isityalo sikwadlala indima kwiinkolelo: i-inettles kuthiwa ikhusela kumlingo okanye ubuhlwempu.