Hardwood chips are now driving the first solid-fuel trucks to appear on American highways.
Top: Herman Reese adds wood to hopper of first truck he converted. Middle: Before it enters the engine of a vehicle, producer gas is mixed with air by the perforated valve on the pipe. Bottom: Chunks of charcoal-like ash are removed from the generator daily.
PHOTO: TRAVIS BROCK
One way to set up a wood gas vehicle (used in World War II Europe) is to mount the generator at the back end of the car.