The advantage of burning hydrogen over any other fuel is that when hydrogen burns it combines with oxygen and the only emission from this reaction is water. Fossil fuels like petrol (gasoline) in the United States alone emit more than 1 1/2 billion tons of greenhouse gasses into the atmosphere every year. Since the early 1980s, Los Alamos National Laboratories in the U.S. as well as laboratories in Germany, Norway and Japan have been aggressively developing fuel cells for the automotive industry.

On the Other: Hydrogen for Cars is a New Technology

Hydrogen in commercial vehicles is a new technology. As with all new technologies there can be unforeseeable problems associated with it. In 2010, hydrogen-powered cars are also about double the price of a petrol (gasoline) powered car. Until an infrastructure of filling stations for hydrogen is implemented it will be difficult to fill up your hydrogen-powered car.

Bottom Line

Hydrogen is certainly a much better fuel as far as emissions are concerned for the environment. It will, however, be difficult in the foreseeable future to run a pure hydrogen automobile. The logistics of finding fuel and the original cost of the vehicle are still daunting problems. A hybrid car that will run on either petrol (gasoline) or hydrogen is being developed. But if you are truly a green person, a hydrogen fuel car or a gas-hydrogen hybrid is the vehicle for you.

Source:

Hydrogen Cars Now

MSNBC: Hydrogen Cars Ready to Roll for a Price

More Information:

Hydrogen Car Info