Kasa, fakaʻaongaʻi ko ha lolo fakaʻapi, maʻolunga ʻi he lavameʻa ʻa e afi mo e fakafepaki ki he afi. Tautefito, ʻOku ʻikai ko ha kohu ʻuliʻuli ʻa e kasa maʻa, ka ʻoku ne ʻomi ha ulo lanu pulu.
ʻI hono fakafehoanaki, ʻOku faʻa ʻi ai ha ngaahi ʻelemeniti kehe ʻo e kasa kuo viviku pe dimethyl ʻEta, ʻa ia ʻoku vela ʻaki ha ulo kulokula.
ʻOku kau ʻi he ngaahi tefitoʻi polokalama ʻa kasa ʻa e barbecuing, powering e ngaahi sitou ʻoku toʻotoʻo holo, mo hoko ko e penisini ʻo e ngaahi meʻallele. Ko ha fili manakoa foki ia ki he nofo kemi ʻi tuʻa, ʻomi ʻa e ngaahi founga fakamafana mo e feimeʻatokoni fakatouʻosi.
Kasa lolo fokotuʻu, ha naunau mahuʻinga ʻi he ngaahi ngaue petrochemical, ʻOku predominantly fakaʻaongaʻi ia ki hono ngaohi ethylene ʻi hydrocarbon papa pe ko hono faʻu synthesis kasa ʻo fakafou ʻi he mao liliu maama.