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ENV fuel cell motorcycle
English company Intelligent Energy calls its ENV the world's first purpose-built fuel-cell motorcycle. The hydrogen-powered two-wheeler, which made its North American debut in June 2005, is said to hit speeds of 50 mph and run for four hours without refueling.
Core fuel cell
The ENV's fuel cell, the Core, is detachable from the bike and can be used with other machines. On the lightweight motorcycle, it teams with a battery pack to provide 6 kilowatts of peak power.