br Perhaps you’ve already heard about fuel cells or even about hydrogen fuel cell car. Yet, only a few knows how it works and why it is very important in the coming years. Global warming poses a great threat to the Earth and one way to address such problem is to look for an alternative source of energy. Great attention is now focused in the production of fuel cells for automobiles. In fact, car manufacturers are designing sophisticated cars that make use of the hydrogen technology. A good thing about using hydrogen fuel cells is that the byproduct is not harmful to the environment. By using the fuel cells, oxygen is eliminated which is also needed by humans.