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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.

Mazda builds 1 millionth MX-5

Mazda produced its 1 millionth MX-5 Miata on April 22. Known alternately as the Miata, the Mazda Roadster, or the Eunos Roadster, the MX-5 has long held the record as the best-selling open-top two-seat sports car. It topped half a million at the turn of the millennium, and hit 800,000 less than a decade ago. The MX-5 recently entered its fourth generation over 27 years, which only promises to drive that record number higher. While it's not one of the most prolific automobiles in history – Ford has made over 34 million F-Series pickups and Toyota produced over 40 million Corollas – the Miata stands as a rather notable exception among niche performance vehicles. Related Video: Mazda Produces One-Millionth Mazda MX-5 HIROSHIMA, Japan—Mazda Motor Corporation announced today that production of the Mazda MX-5 (Mazda Roadster in Japan) reached one million units on April 22, 2016. The milestone figure was achieved over 27 years, with mass-production of the MX-5 starting at Ujina Plant No. 1 in Hiroshima in April 1989. "From the first generation through to today's fourth-generation model, the reason we have been able to continue selling the MX-5 all these years is due to the strong support of fans around the world," said Masamichi Kogai, Representative Director, President and CEO. "Mazda was founded in Hiroshima 96 years ago, and as we move toward our centennial year we will continue offering customers the joy of driving with this model, which has become a symbol of our brand. Mazda aims to create a special bond with customers and become a 'one-and-only' brand they will choose again and again." As a way of expressing thanks to MX-5 fans and owners, the One-Millionth MX-5 will be displayed at fan events in Japan and around the world. The tour begins on May 3 at the Hiroshima Flower Festival where the car will participate in the Flower Parade. The MX-5 is a symbol of Mazda's car-making philosophy and tireless pursuit of driving pleasure. Since its debut in 1989, the model has consistently offered driving fun that can only be experienced in a lightweight sports car and won the admiration of people from various countries, cultures and age groups. The MX-5 is also critically acclaimed, with over 200 awards from around the globe to its name. The fourth-generation model released last year has won a string of awards, including 2015-2016 Car of the Year Japan, World Car of the Year and World Car Design of the Year 2016.

MotorWeek checks out two sides of the '90s Japanese car scene

MotorWeek's Retro Reviews let you feel nostalgic about a huge range of classic cars, and the latest two releases offer a look at two very different sides of the Japanese car market in the 1990s. The video above shows off tuned examples of the Mazda RX-7 and Nissan 300ZX. Check out the clip below to remember the 1997 Honda CR-V, if you want to reminisce about something a little more utilitarian. The RX-7 and 300ZX were among the era's best Japanese sports cars, and these examples' suspension and engine overhauls gave them an extra boost. Peter Farrel Supercars tunes the Mazda, and the vibrant yellow paint and body kit make it look ready for an episode of Initial D. The updated powertrain stands up to the mean styling and gets the RX-7 to 60 miles per hour in 4.5 seconds. The Stillen 300ZX GTZ sports a giant wing, and new turbos take the output to 465 hp. It sprints to 60 in 4.9 seconds. The CR-V sits on the opposite end of the automotive spectrum as the tuned RX-7 and 300ZX, but it's even more important in a historical sense. The Honda (along with the Toyota RAV4 and others) was among the progenitors of today's mega-popular compact crossovers. These early examples set the foundation for offering buyers a utilitarian vehicle in a comfortable package with good fuel economy at an affordable price. The CR-V had some quirky charm, too, like the removable picnic table hidden in the cargo floor. This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.