Henry Ford's Model T was designed to run on hemp gasoline, and the car itself was built from hemp.  Automobile panels built from hemp are 4 times stronger than steel.  Hemp itself has very little of the ingredient that Marijuana has, and cannot be used as a drug.  Added to that, hemp produces 4 times as much paper fiber per acre than do trees.  Hemp was outlawed by big money interests, not because of its drug potential, but because it competed with the timber interests and other financial interests.

Great site on hemp and it's potentials:

(from that site)

* Henry Ford's first Model-T was built to run on hemp gasoline and the CAR ITSELF WAS CONTRUCTED FROM HEMP! On his large estate, Ford was photographed among his hemp fields. The car, 'grown from the soil,' had hemp plastic panels whose impact strength was 10 times stronger than steel; Popular Mechanics, 1941.