2004 Mazda Tribute Lx Sport Utility Sunroof Loaded Great Carfax on 2040-cars

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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.

Fiat 124 spied with top down

With fall officially here, the days are rapidly running out for much of the country to put the top down and enjoy a convertible. Fiat apparently wants to take advantage of the good weather while it lasts, given these fresh spy shots of the 124 Spider testing with the roof down. In terms of styling, these photos show the droptop with an extremely similar look to the ones from July. The roadster still appears to have rounded headlights and a wide grille up front, which the kidney-shaped cladding does nothing to hide. The hood bulge continues to be there, too, and so is the spiderweb-pattern camouflage. However, these new shots let us check out the roll hoops that are visible with the top out of the way, and we even get to see the manual roof in operation. Also, note there are now dual exhausts at the rear, rather than the quad tips from before. Underneath all this camo and cladding, we know that the 124 Spider shares underpinnings with the new Mazda MX-5 Miata. The engine remains a mystery, but competing rumors suggest the 1.4-liter turbocharged four-cylinder from the current 500 Abarth or the 1.7-liter turbo four from the Alfa Romeo 4C. Thankfully, an answer might not be too far away because the roadster is mooted to debut this year, possibly at the Los Angeles Auto Show in November. With the latest Miata receiving high praise from critics, the motoring world soon gets to find out whether Fiat can find any room for improvement. Related Video:

Mazda5 may not be long for this world

The concept behind building a smaller but still useful minivan like the Mazda5 always seemed like such a good idea. However, since the little people hauler's introduction, there has been the rise of the compact crossover in the US, which fulfills a similar niche for many buyers. The future is not looking good for the utilitarian Mazda. Autocar from the UK reports that company officials confirm the Mazda5 is being discontinued there, with no replacement planned. Autoblog reached out to Mazda North America, but the company would not verify future product changes in this region. Though, the model's cancellation would hardly be a surprise to follow in North America, as well. The minivan market is a tough place these days, and dealers tend to prefer more expensive models for their high margins. Even FCA US is abandoning the inexpensive portion of the segment for the next-gen Chrysler Town & Country. The Mazda5 isn't exactly a sales standout, either. Mazda sold 11,613 of them in all of 2014, which was a 16.4 percent drop from 13,884 in 2013. To compare to larger, more expensive minivans, Honda moved 122,738 units of the Odyssey last year, and Toyota did 124,502 examples of the Sienna. Related Video: Featured Gallery 2012 Mazda5 View 31 Photos News Source: AutocarImage Credit: Mazda Mazda Minivan/Van mazda5