Ronn Motors‘ The Scorpion is claimed to be the “first commercial vehicle with a system built-in that produces hydrogen on demand.” During normal operation, hydrogen would be mixed with petrol for improved gas mileage.

Without the hydrogen injection system, the Scorpion reaches 27 mpg; with it, it tops out at 40 mpg. For an eco-car capable of 200 mph that goes 0-60 in 3.5 seconds, that’s not half bad.

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