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Have you ever heard of a car that burns wood? I was talking to a man in his 80s who remembers riding in wood gas cars. When he was a child, gasoline was very expensive. It was easier and cheaper to get wood, so they built cars with engines on the back that burned wood instead of gasoline. There were many of these cars in Europe, too. The engine looked like a big water heater. When the car stopped, the driver or the passengers would get out and put more wood into the engine. Some people have started driving this kind of car again, especially in countries with a lot of trees like Finland. (by Prof. Douglas Jarrell. You can read more such short stories at http://catchawave.jp/m/jm/)
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(Image from https://www.musclecarszone.com)