Can We Use Wood to Beat the Gasoline Shortage?

Hardwood chips are now driving the first solid-fuel trucks to appear on American highways.

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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