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5Countdown to Earth Day: What does it mean to be green?

The word "green" in the transport context has been tossed around quite a bit over the years and has garnered for itself a host of connotations, some of them negative. There are people who might conjure up images of unwashed hippies in a 30 year-old biodiesel rust bucket when they think of green car, but others might imagine smug-looking suburbanite Prius drivers. As we approach the 41st Earth Day we thought it'd be a great time to ask ourselves our readers, "What does it mean to be green?"

4Countdown to Earth Day: Regenerative braking 102

When is regenerative braking not regenerative braking? Pretty much all the time, it turns out.

7Countdown to Earth Day: How to charge your electric car when you live in an apartment

Nowhere in the picture above do we see an easy place to charge an electric car, do we? The challenge of powering up plug-in vehicle in a densely populated urban environment is something that has been an issue in the EV scene for a while (and something we've covered a lot in the past), and it is most certainly a worthwhile topic for our Countdown to Earth Day series for new readers.

11Countdown to Earth Day: Need tires? Save fuel with low-rolling resistance tires

Let's say that your vehicle's tires are nearing the end of their useful life. Looks like you're in need of standard replacement tires then, right? Well, instead of opting for a conventional tire you could save fuel by picking up a set of low-rolling resistance tires.

27Countdown to Earth Day: Wanna save gas? Here's how!

Everybody wants to save gas, right? Well, if you're one of the countless drivers looking to slash your fuel consumption, then you've come to the right place 'cause we've got some tips that should boost your vehicles miles per gallon.

18Countdown to Earth Day: What's up with this ethanol in gasoline?

When gassing up your vehicle, you've likely noticed a sticker on the pump that reads "this fuel may contain up to ten percent ethanol" or something similar. Have you ever asked yourself, "what's up with this ethanol in gasoline?" Well, get ready 'cause we've dug up an answer.

4Countdown to Earth Day: PHEV? BEV? E85? What's with all the acronyms?

Deciphering the meaning of automotive acronyms can be complicated. To alleviate confusion, we've compiled this condensed list of some acronyms associated with the types of vehicles that you'll encounter when perusing the AutoblogGreen site:

16Countdown to Earth Day: Keeping tires properly inflated improves gas mileage by 3.3%

Keep your tires properly inflated. That's what the Environmental Protection Agency keeps telling us. Did you know that under-inflated tires require more energy to roll? This not only wastes fuel, but wears tires out more quickly, eventually requiring costly replacements. Furthermore, under-inflated tires can heat up excessively, leading to a possible blowout.

29Countdown to Earth Day: Here's why your vehicle's gas mileage drops in cold weather

Driving in the dead of winter is harsh on a vehicle, and many of you have undoubtedly noticed that your fuel economy suffers as temps dip. In practice, gas mileage drops approximately 10 percent when temps go from cozy (60-80 degrees Fahrenheit) to bitter cold (less than 32 degrees Fahrenheit). But why does the weather affect the gas mileage of your vehicle?

21Countdown to Earth Day: What to consider when buying a green car

They may not be dominating American roads (or any roads in the world, except for slot-car race tracks), but new electric vehicles are adding one more option to a growing list of potential "green" vehicles on every car buyer's shopping list. Like changing your incandescent light bulb for a compact fluorescent light bulb, the benefits of exchanging an inefficient gas guzzler for a high-mileage car really depend on what vehicle you're driving now, how many miles you drive per day and what your othe

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