Fuel Efficiency

Fuel efficiency has become an extremely important topic in today's world because of rising gas prices, the need to cut our carbon footprints, and the need to cut dependence on oil-rich nations. Check out these great articles on fuel efficiency.

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Running a car on compressed air isn't exactly a new idea. In fact, the technology dates back to the early 1930s. So what makes Magnetic Air Motors' magnetic air car unique?

By Kristen Hall-Geisler

They said it couldn't be done: No one could build a car capable of traveling 100 miles or more on a single gallon of gasoline. They were wrong.

By Akweli Parker

By 2025, it's quite possible that the average passenger automobile will be capable of getting more than 50 miles per gallon (21.3 kilometers per liter) — if it runs on conventional fuel at all.

By Akweli Parker

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During times of rising gas prices, which seems to be all the time, vehicle owners are on the lookout for a well-priced product that can save them a few dollars in the long run.

By Christopher Neiger

A fuel cell uses a positive electrode (the cathode) and a negative electrode (the anode) with an electrolyte in between for conducting charged particles. How much do you know about fuel cells?

By Jane McGrath

By 2025, the Obama administration would like to see the average vehicle rated at 54.5 mpg, or 37 mpg on a window sticker. Considering that the industry has made just over 2 percent gains a year since 2007, this is no small feat.

By Kate Kershner

To make natural gas a viable fuel for vehicles, it must be compressed. This allows more fuel to be stored per volume, among other things. How much do you know about natural gas?

By David DeFranza, Planet Green

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Anyone who's seen the famous, grainy footage of the Hindenburg disaster is familiar with the idea that hydrogen ignites easily. Burning unlocks stored energy, making hydrogen useful as a fuel.

By Josh Clark

Natural gas generators, as the name suggests, use natural gas -- which includes the propane used for backyard grills or the methane that utilities supply through underground lines -- to generate electricity.

By Matt Cunningham

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?

By Gallagher Flinn

Fuel economy labels have been around for about three decades. But now it's time for new labels, and the EPA calls it "the most dramatic overhaul in the history of EPA's labeling program."

By Christopher Lampton

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Gas vs. Grid: Gasoline and Electricity Face Off! Check out this awesome infographic projecting energy consumption in 2012 and discover which cars are the most fuel efficient.

Avoid topping your gas off. Learn in this article why you should avoid topping your gas off.

By Jasmin Malik Chua, Planet Green

Go on any highway and you'll see many vehicles with roof racks. Learn more about your roof rack affecting your gas mileage.

By Michael Graham Richard, Planet Green

Fuel options for the future. Read this article to learn the fuel options for the future,

By Team Planet Green

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Fossil fuels (like gasoline and diesel) are running out and getting a bad rap for nasty tailpipe emissions -- and rightly so. Learn more about how green are automotive lithium-ion batteries.

By Kristen Hall-Geisler

During the summertime, it could be said that the hottest moment between is when you first get into your vehicle. Learn more about cooling your vehicle quicking during an intense summer heat and reduce carbon emissions.

By Eric J. Leech, Planet Green

How to tune your own car for better gas mileage. In this article, learn how to tune your care for better gas mileage.

By Eric J. Leech, Planet Green

The average motorcycle gets 35-40 miles per gallon. Learn more about improving your motorcycles gas mileage with these 10 tips.

By Josh Peterson, Planet Green

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Turn off your engine can help the you go gree nand save on gas. Learn more in this article.

By Jasmin Malik Chua, Planet Green

Turn the A/C off in your car before you get to your destination. Learn how truning you’re A/C off before you get to your destination can help the environment.

By Michael Graham Richard, Planet Green

What to save gas? Follow that truck! Learn in this article how you can save gas by following behind large trucks.

By Jasmin Malik Chua, Planet Green

Why fuel additives won't improve performance and gas mileage. Learn why fuel additive won't improve proformance and gas mileage in this article.

By Eric J. Leech, Planet Green

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Fuel cells run on hydrogen, which has a low ignition point. Learn about the safety concerns of fuel cells in this article.

By HowStuffWorks.com Contributors

All fuel cells require hydrogen to work. Learn more about a hydrogen fuel reformer from this article.

By HowStuffWorks.com Contributors