Hydrogen is the most abundant element, but it’s almost always stuck to something else (like water or methane). We have to "unstick" it:
Unlike a battery, it doesn't need to be "recharged" for hours—you just pump in more hydrogen, similar to filling a gas tank. 3. Why they matter together
A fuel cell takes that hydrogen and combines it with oxygen from the air to create an electrochemical reaction. Clean electricity and a little bit of heat. The "Exhaust": Just pure water vapor ( H2Ocap H sub 2 cap O