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This map reveals the cleanest vehicles based on location

Naysayers love to point out how dirty the electricity grid mix is when it comes to charging electric vehicles. Curmudgeons are eager to jump into any conversation about EVs to enlighten the lucky listeners about how plug-in cars contribute to pollution, sometimes even throwing in a dash of climate-change denial for good measure. (Thanks, buddy. Pray, tell me more about the plight of oppressed SUV owners.) Unless someone buys an EV just because they think they're cool (which, yeah, they often are), they probably have at least a passable understanding of their environmental pros and cons. As many EV owners are already aware, location has a lot to do with any particular plug-in car's carbon footprint. Still, there's always more to know, and knowledge is not a bad thing, especially if one uses it to do the right thing. That's why this handy-dandy map from Carnegie Mellon University is so interesting. CMU researchers have compiled information about the lifecycle greenhouse gas emissions of various EVs based on where they're charged, as compared to gasoline-powered vehicles. The researchers looked at the Nissan Leaf, Chevrolet Volt, and Prius Plug-In Hybrid versus the gasoline-dependent Toyota Prius hybrid and the stop-start-equipped Mazda3 with i-ELOOP and compared grams of CO2 emitted per mile. CMU takes into account the grid mix, ambient temperature, and driving patterns. CMU takes into account the grid mix based on county, as well as ambient temperature and driving patterns in terms of miles traveled on the highway or in the city. For instance, if you drive a Nissan Leaf in urban areas of California, Texas, or Florida, your carbon footprint is lower than it would be if you were driving a standard Toyota Prius. However, if you charge your Leaf in the Midwest or the South, for the most part, you've got a larger carbon footprint than the Prius. If you live in the rural Midwest, you'd probably even be better off driving a Mazda3. Throughout the country, the Chevrolet Volt has a larger carbon footprint than the Toyota Prius, but a smaller one than the Mazda3 in a lot of urban counties in the US. The Prius and Prius Plug-In are relatively equal across the US. Having trouble keeping it straight? That's not surprising. The comparisons between plug-in and gasoline vehicles are much more nuanced than the loudest voices usually let on.

Cedar Rocket is the fastest all-electric log car in the world

An electric turbine manufacturer, a mechanic, and a log house builder walk into a bar. No, wait. The three are standing around at Barrett-Jackson a few years ago, talking about the world. What's the eventual punchline? An all-electric vehicle mash-up of a Mazda RX-8 and a giant piece of wood. One that was just awarded a Guinness World Record for "fastest motorized log." "Truly, what else would you think of?" - Bryan Reid, Sr. Bryan Reid, Sr., star of the reality show Timber Kings, is the log house builder in the set-up above, and he's now the proud owner of Cedar Rocket. He told AutoblogGreen that a log-based EV is the natural result of the three guys chatting. "Truly, what else would you think of?" he said. "I mean, really? There has to be something to come out of it other than girls. It was crazy, but it's a good story and nobody gets hurt. It's hard to make the news when everything's positive." Idea in hand, Reid and his friend set off to actually build the car. Gerald Overton, the mechanic, turned the Mazda into a welcoming recipient, working on the disc brakes, axles, frame, differential, and suspension. While the presence of a television producer kept things moving, Reid said that it still took almost two years. "It started out, not as a joke, but as something very light," he said. "You put a log on a couple of axles and 'ha ha.' It ended up taking many thousands of hours. We don't do anything halfway." In the end, Reid and the team took the Cedar Rocket to the Wild Horse Pass Motorsports Park in Chandler, Arizona and managed two runs of 55 miles per hour within an hour (that's what Guinness required to hand out the official record). The Rocket is incredibly stable – heavy batteries help there – and Reid pointed out that because the EV uses electric turbines, it's not a quarter-mile car. "It's more like a salt-flat car," he said, because the "turbines that take a while to spin up." Given the right conditions, Reid said the team thinks the Cedar Rocket could go 120-130 mph. "It's crazy because it's different." But the point of this car isn't to just go fast. The builders will bring the car to Barrett-Jackson and auction it off next year, but before that it will make the rounds at places like SEMA and a number of unexpected events, like golf shows. The point is to get attention and raise money and awareness for veterans groups. "I believe it's for the best cause in North America," he said.

2016 Mazda MX-5 Miata Launch Edition now available for pre-order

Want to be one of the first to buy the fantastic new 2016 Mazda MX-5 Miata? Now's your chance. The pre-order books open at 12:00 PM Eastern for the very special Launch Edition, which is limited to just 1,000 units. All of the MX-5 Miata Launch Edition cars come painted in Soul Red with a Sport Tan leather interior, an exclusive combination for this special run. Buyers only need to choose between the six-speed manual transmission (the obvious choice), or a six-speed automatic. Pricing is set at $30,495 if you want the stick-shift, and $31,570 if you prefer the auto. So, want one? Of course you do. Head over to Mazda's pre-order site and place a $500 deposit toward the purchase of your car. Better act fast, though. When Mazda offered its 25th Anniversary MX-5 Miata via pre-order, all 100 of those cars sold out in just ten minutes.