1994 Nissan 300zx Base Coupe 2-door 3.0l 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.

Nissan Sentra crash rating improves, now Top Safety Pick [w/video]

After a poor showing in the hands of the Insurance Institute of Highway Safety back in 2013, Nissan is back for another round of crash testing with its 2015 Sentra, and it's walking away with a Top Safety Pick. The compact sedan's small overlap front crash test rating improved from "poor" to "good", owing to internal improvements to the A-pillar, door sill and front structure, IIHS said in a statement. The dummy, in this most recent test, was at a low risk of injuries because of the structural changes. Take a look at video of the Sentra's small overlap crash test, available up top, and the official press release down below. 2015 Nissan Sentra earns TOP SAFETY PICK award ARLINGTON, Va. - The 2015 Nissan Sentra has improved from a poor to good rating in the Insurance Institute for Highway Safety's small overlap front crash test, qualifying for the TOP SAFETY PICK award. The small car's front structure, A-pillar and door sill were modified to reduce intrusion in small overlap crashes. In addition, the side curtain airbag was lengthened to protect the driver's head. In the latest test, the driver space was maintained well, with maximum intrusion of less than 5 inches at the lower door hinge pillar. The dummy's movement was well-controlled. The head hit the front airbag and stayed there until rebound, while the side curtain airbag had enough forward coverage to protect the head from contact with side structure and outside objects. Measures taken from the dummy indicate a low risk of injuries in a crash of this severity. In contrast, the 2013-14 Sentra didn't hold up as well in the test. Intrusion measured as much as 13 inches at the lower hinge pillar. The dummy's head slid off the left side of the frontal airbag, and the side curtain airbag didn't offer adequate coverage. Measures from the dummy indicated that injuries to the left leg would be possible in a crash of this severity. Introduced in 2012, the small overlap test replicates what happens when the front corner of a vehicle collides with another vehicle or an object such as a tree or a utility pole. The Sentra's good ratings in the moderate overlap front, side, roof strength and head restraint tests carry over to the 2015 model year. To qualify for the 2015 TOP SAFETY PICK award, a vehicle must have good ratings in those four tests and a good or acceptable rating in the small overlap test. Related Video:

Race Recap: 2014 24 Hours of Le Mans defines 'endurance'

Commenting on the rush of events that rocked beginning and end of the 24 Hours of Le Mans, Paul Truswell of Radio Le Mans said "the race is about the ability to endure, not just the ability of drivers to do what they do for a long time." The entire race machine, all the way down to the pit boards and radios, has to survive the stress and abuse of the entire day. This was the race to prove those words.
There were two Toyotas, two Porsches and three Audis, five of the seven led the race at some point, six of the seven ran in the top three. Toyota will be hugely disappointed that it didn't win when its car and drivers were so, so strong, but they gave Audi the kind of scare we haven't seen since the best of Peugeot's days, and Toyota did a better job of it even in the loss. Porsche blew away everyone's expectations, falling 3.5 hours short of a fairy tale ending that would have made Disney cry.
But Le Mans doesn't really do fairy tales. Well, not that fairy tale. Audi's Twitter handle during the event was #welcomechallenges. As usual, Le Mans answered for the entire field.