Making car engines run off hydrogen is easy. Probably could be done with little more than a firmware upgrade of the computer and a swap out of the exhaust system for stainless steel (hot steam can be rather corrosive).
The problem is storing enough hydrogen safely to get 300 miles per fill up. Americans seem to require a magic 300 miles per stop, otherwise electric cars that get 80-100 miles per charge would be an easier sell. (This is in spite of the fact that 80-100 miles is longer than almost everyone drives on nearly any given day.)
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The problem is storing enough hydrogen safely to get 300 miles per fill up. Americans seem to require a magic 300 miles per stop, otherwise electric cars that get 80-100 miles per charge would be an easier sell. (This is in spite of the fact that 80-100 miles is longer than almost everyone drives on nearly any given day.)