Photo courtesy Ballard Power Systems
A prototype fuel-cell car
You may have heard a lot recently about fuel cells. According to many news reports, we may soon be using the new energy-saving technology to generate electrical power for our homes and cars. The technology is extremely interesting to people in all walks of life because it offers a means of making power more efficiently and with less pollution. But how does it do this?

In this edition of HowStuffWorks, we'll take a quick look at each of the existing or emerging fuel-cell technologies. We'll detail how one of the most promising technologies works, and we'll discuss a few potential applications of fuel cells.