Ko e efu ukamea Combustible efu

ʻI he ngaahi tukunga angamaheni, he ʻikai.

ʻOku angamaheni ʻaki hono fakafaʻahinga ʻo e efu ukamea ko ha oxide, ʻiloa ʻi he ngaahi koloa ʻo e kemikale, ʻai ke ʻikai lava ʻo kau ʻi he ngaahi toʻonga ʻa e kemikale ʻi he mafana ʻo e loki angamaheni.