Footnote

a Igama lesiNgesi elithi “petroleum” livela kwigama lesiLatini elithetha “ioli evela ematyeni.” Lidla ngokusetyenziswa ukubhekisela kwizinto ezimbini ezinxibeleleneyo—imethane neoli. Maxa wambi zombini ezi zinto zidla ngokuphuma kwiimfanta ezisemhlabeni. Ioli isenokuba lulwelo okanye ibe yitela ebizwa ngokuba yiasphalt, ipitch okanye ibitumen.