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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.

Autoblog Podcast #394

Episode #394 of the Autoblog Podcast is here, and this week, Dan Roth, Steven Ewing, and Michael Harley talk about the possibility of a supercharged Dodge Viper, the Chevrolet Silverado Rally Edition, the newly released supercharger kit for the Honda CR-Z, and rumblings of an Alfa Romeo 6C. We start with what's in the garage and finish up with some of your questions, and for those of you who hung with us live on our UStream channel, thanks for taking the time. Check out the rundown below with times for topics, and you can follow along down below with our Q&A. Thanks for listening! Autoblog Podcast #394: The video meant to be presented here is no longer available. Sorry for the inconvenience. Topics: Supercharged Viper Chevrolet Silverado Rally Edition Honda CR-Z Supercharged Alfa Romeo 6C In The Autoblog Garage: 2014 Ford Fiesta SE 2015 Cadillac Escalade 2015 Toyota Tundra TRD Pro 2015 Audi A8 L TDI Hosts: Dan Roth, Steven Ewing, Michael Harley Runtime: 01:32:30 Rundown: Intro and Garage - 00:00 Supercharged Viper - 44:25 Chevrolet Silverado Rally Edition - 55:19 Supercharged Honda CR-Z - 01:00:52 Alfa Romeo 6C - 01:07:29 Q&A - 01:13:41 Get the podcast: [UStream] Listen live on Mondays at 10 PM Eastern at UStream [iTunes] Subscribe to the Autoblog Podcast in iTunes [RSS] Add the Autoblog Podcast feed to your RSS aggregator [MP3] Download the MP3 directly Feedback: Email: Podcast at Autoblog dot com Review the show in iTunes

Honda Civic losing ground to Toyota Corolla, sales crown threatened

Oh, what a difference a year has made. When the numbers were tallied for 2013, the Honda Civic was riding high by claiming its segment's sales crown in the US despite being challenged by the latest generation of the Toyota Corolla for part of the year. However, with just a month to go in the battle for C-segment supremacy in 2014, it looks like Toyota gets to hoist the trophy this time. Looking at November sales numbers, Honda moved 300,644 Civics through the first 11 months of the year, down 2.1 percent in volume. Furthermore, for the month alone, the company sold 23,060 Civics, a 12.3 percent drop. Meanwhile, on Toyota's side, business has been booming comparatively. Through the first 11 months it sold 309,373 Corollas, a 10.6 percent jump, and for November alone it moved 25,609 examples, a 14.2 percent improvement. With fewer than 10,000 cars between them, it would take quite a December slump for the Corolla to lose this fight. According to The Truth About Cars, the Civic actually started out the 2014 somewhat positively with 5 percent growth over the previous year, though still behind the Corolla's figures. However, the Honda has seen a slide since then with five consecutive months of sales drops. Meanwhile, the Toyota has generally kept showing growth. Being the newer model of the two, the Corolla comes to this fight with an advantage. Honda hasn't let the Civic languish; it gave the model a CVT in 2014 to boost fuel economy. That's nothing like the Toyota's thorough recent rethink, though. According to TTAC, Honda does have reason to crow about the Civic, just not necessarily in the US. The model is on track to be the bestselling vehicle in Canada for the 17th consecutive year and have its best sales since 2008 there.