You may have seen ads for so-called fuel-saving devices that make outrageous claims about their effectiveness. But are there any that actually work? Get the facts about fuel-saving devices in these articles.
Be Your Own Mechanic

What's the energy efficiency ratio for hydrogen fuel cells?

Instead of burning fuel like conventional engines, hydrogen fuel cells work through an electrochemical process. To produce electricity, hydrogen atoms are ionized on one side of an electrolyte membrane. How much do you know about hydrogen fuel cells?

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