2. How do hydrogen fuel cells work? First, a membrane separates the hydrogen and oxygen Then, the hydrogen molecules try to reconnect with oxygen to create water Because of the movement, the electrons moving around the barrier to keep up with the hydrogen create electricity http://auto.howstuffworks.com/fuel-efficiency/alternative-fuels/fuel-cell.htm

3. PROS Hydrogen is very available Only byproduct is water, (no CO2) Renewable Can get up to 480 miles per tank Hydrogen is twice as efficient as gasoline http://money.usnews.com/money/personal-finance/articles/2008/01/11/the-pros-and-cons-of-8-green-fuels

4. CONS Although water is an option, it’s best and cheapest source of energy is natural gas which is non renewable There is no distribution or battery to save the energy which is needed for high pressure in the car http://money.usnews.com/money/personal-finance/articles/2008/01/11/the-pros-and-cons-of-8-green-fuels