Since the dawn of the automobile, gasoline has been the most popular fuel type by far. The process of obtaining gasoline for fuel use is an involved process that many folks claim hurts the environment. After all, it needs to be drilled out of the ground, sent somewhere via a gigantic pipeline or massive barge, refined in a lengthy and expensive process, and then shipped back out to wherever it's destined in its finished state.

Whether or not you agree with the environmental impact of gasoline and diesel, one true fact of fossil fuels is that, someday, we'll simply run out. What do we do then if we haven't transitioned to something else? That's where hydrogen comes into play. It's the most abundant element in the universe, and when burned for fuel, the only tailpipe emission is water vapor. Why hasn't the entire world been scrambling to perfect the use of hydrogen power if all it emits is literal water? Well, Toyota has tried, but despite its massive influence, hydrogen combustion simply hasn't caught on.