How to sign: a substance that can be consumed to produce energy
"more fuel is needed during the winter months"; "they developed alternative fuels for aircraft";
Within this category: biomass, butane, charcoal, coal gas, coke, combustible, diesel oil, firewood, fossil fuel, fuel oil, gasohol, gasoline, igniter, illuminant, kerosene, methanol, nuclear fuel, propane, red fire, water gas