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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.

Mazda2 sedan images released ahead of Thailand reveal

Mazda will let customers put some junk in the trunk of its Mazda2 with the introduction of a new four-door model at the upcoming Thailand International Motor Expo on November 28. While the show is still days away from beginning, the Japanese automaker is already spilling some of the details about the sedan variant of its fetching subcompact. The four-door and traditional hatchback versions of the Mazda2 will both hit Thailand in early 2015. The two of them are essentially identical other than the added trunk and adjusted rear styling for the sedan. It basically makes the model look like a shrunken down version of the Mazda3 sedan, which isn't a bad thing at all. The company has big expectations for the little car because they're already Mazda's bestselling passenger models in Thailand. Both models will be sold with the SkyActiv-D 1.5 diesel in Thailand, which gives them lower taxes under the government's low-emission, compact car incentive plan. According to a previous rumor, a gasoline-fueled mill could join the lineup eventually, too. There's also gossip that the Mazda2 sedan could eventually be sold in Australia and Europe, but US sales are still a mystery. When asked about the four-door here, Mazda spokesperson Eric Booth told Autoblog, "We'll have more to say on Mazda2 at a later date. Right now, our focus is on the launches of the all-new CX-3 and MX-5 as well as the refreshed CX-5 and Mazda6." The company is showing all of those models at this week's Los Angeles Auto Show. Mazda to Debut the All-new Mazda2 Sedan at Thailand International Motor Expo - Goes on sale in Thailand alongside the hatchback model early 2015 - HIROSHIMA, Japan-Mazda Motor Corporation will debut the sedan model of the all-new Mazda2 (known as Mazda Demio in Japan) at the Thailand International Motor Expo 2014*1 on November 28, 2014. The all-new Mazda2 compact sedan features handsome proportions and bold styling, a high-quality, sporty interior and a combination of excellent driving performance and outstanding environmental and safety performance. The all-new Mazda2 hatchback will also be exhibited at the expo; the first time the model has been displayed to the public in Thailand. Both the sedan and the hatchback feature the SKYACTIV-D 1.5, Mazda's newly-developed small-displacement clean diesel engine. The all-new Mazda2 goes on sale in Thailand in early 2015.

Japan plans real-world diesel emissions test after companies fail

Japan's transport ministry plans to start real-world diesel emissions tests after an experiment found four models from Toyota, Nissan, and Mitsubishi that produced more nitrogen oxide (NOx) emissions than the nation's rules allow, according to The Japan Times. Regulators there usually only perform emissions checks in the lab. The VW diesel scandal has everyone double-checking their figures. Diesel versions of the Toyota Hiace van, Land Cruiser Prado, and Nissan X-Trail produced up to 10 times more NOx than allowed. The Mitsubishi Delica D:5 was up to five times over the limit, The Wall Street Journal reports. There was no evidence of defeat devices in the vehicles. Mazda performed well in the experiment, though. The CX-5 passed with nearly the same results on the road and in the lab. The Demio, better known as the Mazda2, did nearly as well with only slighter higher figures in the real world than in the controlled setting. The experimenters theorized the reason for the excessive emissions was that cold weather caused the engines' software to shut off the exhaust gas recirculation to prevent damage, according to the WSJ. However, this behavior also increased NOx production. Toyota, Nissan, and Mitsubishi don't have to worry about punishment from the transport ministry because this check was just an experiment. Their models already passed the mandated lab tests, which was the only requirement, according to The Japan Times. As governments begin greater real-world emissions tests, the results suggests diesels aren't very clean. A recent check in France found models from Ford, Renault, and Mercedes-Benz that didn't perform up to the standards. Regulators in India conducted similar evaluations and ordered VW to recall over 300,000 vehicles. Related Video: