Automotive manufacturers and energy companies continue to tout hydrogen as a zero polluting fuel of the future. But just how far away is that future?

The United States has hopes to fill American roads with hydrogen-powered cars in two decades, but the clean fuel must be cheap and practical to make before it can replace oil.

Many energy gurus are now saying that twenty years might be too ambitious a goal. In order to start producing hydrogen like gasoline, and to organize the infrastructure needed to build and supply the number of fueling stations needed, we are most probably looking at closer to one hundred years to have hydrogen make a significant impact.
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