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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.

2013 Pikes Peak Hill Climb, Practice Day 4

The fourth and final practice day of the 91st Pikes Peak International Hill Climb is complete. Tomorrow everyone will make any last-minute adjustments and get their cars, their bits and bobs lined up in the pits for Sunday morning's this-time-it-counts run.
The Unlimited runners took on the top section of the course today, Sébastien Loeb and his big-mouth Peugeot acing the practice test again with a time of 2:11. Rhys Millen's team proved its got the engine issues of two days ago in the Hyundai PM580T sorted out, posting the next-best time at 2:27.16. The reason we had to dip all the way into the hundredths for his time is because he nipped Romain Dumas by just .31 of them, the Frenchman in the Norma M20FC PP running the course in 2:27.47. In fourth came the Frenchman in the monster Mini, Jean-Philippe Dayraut six seconds back at 2:33.
Time Attack competitors, also on the upper section, were led by Paul Dallenbach in the Hyundai Genesis Coupe with a time of 2:36, Porsche pilot Jeff Zwart crossing the line six seconds later at 2:42, fellow Porsche driver David Donner coming in another six seconds back at 2:48. Dallenbach has topped three of the four practice-day sessions, sliding into the second spot behind Donner only on Practice Day 2.

Incoming Toyota chairman wants a Supra successor

We'd venture to guess that in recent years, there have probably been almost as many rumors swirling about a Toyota Supra successor than there have been for a mid-engine Corvette. (Case in point: the speculative renderings we came across a few years ago, pictured above.) While we don't expect the Corvette's recipe to change drastically any time soon, it looks like a Supra - or more appropriately a Supra-like car - could be closer than we think.
First, there was an announcement of a BMW-Toyota joint venture. Said venture would, among other things, "Set up a feasibility study to define a joint platform concept for a mid-size sports vehicle."
Upping chances even further, a new Automotive News report claims that incoming Toyota chairman Takeshi Uchiyamada wants a vehicle "comparable" to the Supra. Clearly there are a lot of parties that want a new Supra to happen - to say nothing of enthusiasts - but Uchiyamada might be just the guy to get it done. None of this is proof positive of an impending Supra, to be sure, but winds do seem favorable.