Danish company Folkecenter has converted a Ford Focus 2-liter gasoline engine to run on hydrogen. The project received support from the Hydrogen Program of the Danish Energy Agency along with some other foreign laboratories.
Unlike other hydrogen ICE engines, this particular car starts up using gasoline, then switches to hydrogen. This helps with a soft-start, which has been problematic with other hydrogen fuel cell and ICE engines. The folks at Folkecenter also say that gasoline or ethanol can be used as a backup in emergency situations in long-distance driving situations.
To complete the hydrogen production and distribution circuit, Folkecenter also uses windmills to create electricity. The electricity is then used to electrolyze water and generate H2, which is then pumped into the modified Ford Focus.