Isingeniso:
Ikhoyili yensimbi egoqiwe eshisayo isebenza emkhakheni wokwakha, imboni yokwakha imikhumbi, i-petroleum, izimboni zamakhemikhali, izimboni zempi nogesi, ukucubungula ukudla kanye nemboni yezokwelapha, isishintshi sokushisa esibhayela, izinkundla zemishini nezinsimbi, njll.