Instead of burning fuel like conventional engines, hydrogen fuel cells work through an electrochemical process. To produce electricity, hydrogen atoms are ionized on one side of an electrolyte membrane. While protons slip through, electrons must take the long way around through an external circuit, creating an electrical current as they move. Once the electrons reach the other side and pair off with the protons, the hydrogen combines with oxygen in the air, resulting in a little bit of heat and water as byproducts.
Algae could one day be the answer to our dependence on fossil fuels. Why? Because it can be converted into oil via several different methods that are relatively inexpensive and safe. Read just how it happens here.
Just because a car says "hybrid" on its side panel, is it really any easier on the environment than its gas-burning counterparts?