Lit., "its tree": a metonym pointing to the plant-origin, direct or indirect, of almost all the known fuels, including mineral fuels like coal, which is but petrified wood, or petroleum, which is a liquefied residue of plant-nourished organisms buried in the earth for millions of years.
Translation
(
56:72) Is it you who have brought into being the tree that serves as its fuel
[23] - or are We the cause of its coming into being?