Welcome 137 to the Senate Floor. The car's fuel comes from water, but it's not water after hydrogen atoms are stripped from the oxygen. Hydrogen is a fuel that comes from an investment of energy from another source. You can't have a 'hydrogen economy' without first having a stable primary source to produce the hydrogen fuel. The advantages of hydrogen are that it can be stored and quickly recharged like any fuel. The drawbacks are that you invest more into producing the fuel than you get back in the exchange.