'Fuel' in the Bible

If it has been put into the fire for fuel, and the fire has consumed both of its ends and its middle part has been charred, is it then useful for anything?

Therefore, thus says the Lord God, ‘As the wood of the vine among the trees of the forest, which I have given to the fire for fuel, so have I given up the inhabitants of Jerusalem;

You will be fuel for the fire; your blood will be in the midst of the land. You will not be remembered, for I, the Lord, have spoken.’”