2005 Nissan 350z Enthusiast Coupe 2-door 3.5l 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 expands, shrinks Leaf recall for missing weld points

Chalk this one up to the quirks of the English language. The other day, we had a post on the recall of a small number of 2014 Nissan Leaf EVs that were missing weld spots. The official bulletin from the National Highway Traffic Safety Administration said that "any vehicle missing welds will be replaced, free of charge." We read that as saying that the welds would be replaced, but in fact it's the cars themselves that will be swapped out. NHTSA said that 211 Leafs were potentially involved in this recall, but we heard from Brian Brockman, Nissan's senior manager of corporate communications, that Nissan is actually looking at, "approximately 276" vehicles. More importantly, Brockman clarified that, "If a vehicle is found to be missing the welds, the entire vehicle will be replaced." NHTSA documents on Inside EVs show that Nissan expects just 0.65 percent of those Leafs will need to be replaced. Brockman wouldn't say exactly how many cars Nissan thinks are affected, but 0.65 percent of 276 is just 1.8 vehicles. Brockman did say that, "you'd be correct to say that we expect the number to be very low." Read Nissan's full statement below. Nissan is conducting a Voluntary Recall Campaign on approximately 276 MY2014 LEAF vehicles to inspect the front member assembly welds. Due to an isolated supplier process error that has been corrected, a small number of vehicles within a subset of MY2014 LEAF vehicles manufactured during a two-week period may have front frame member assembly components that were not welded to proper specification. This can affect crash performance. Within the next few weeks, affected LEAF owners will be asked to bring their vehicle to a certified Nissan LEAF dealer for an inspection. If the vehicle is determined to be affected, Nissan will provide owners with a brand new replacement vehicle at no additional cost. A loaner vehicle will be provided during the vehicle exchange process. It is anticipated that only a handful of retailed vehicles are affected by the weld issue and require vehicle replacement. Nissan is committed to a high level of customer service and satisfaction and is working with its dealers to provide an outstanding ownership experience to Nissan LEAF owners.

Mercedes pickup could have Nissan DNA

Daimler and the Renault-Nissan Alliance are already close partners. Now it seems that the upcoming Mercedes-Benz midsize pickup might have a little Nissan DNA in it, too. Or maybe not, depending on how you interpret comments by Renault-Nissan CEO Carlos Ghosn. "I don't want anybody to think that because they announced a pickup truck, they have to make it with us. Not at all," Ghosn said at the New York Auto Show, according to Automotive News. "They are completely free to do it by themselves, to do it with somebody else, etc., and also, or to do it with us." The Mercedes Vans division is responsible for the truck's development, and the pickup is aimed at the popular global midsize segment against vehicles like the Ford Ranger and Toyota Hilux. There's no mention of any plans for the model in North America. Instead, Mercedes wants to focus on Latin America, South Africa, Australia and Europe for a launch slated before 2020. Ghosn was quite clear there was no decision either way as of yet. "Is this something that can eventually be on the table? I told you, everything is on the table between us," he said, according to Automotive News. If the two companies do decide to collaborate on a midsize truck, the timing would seem perfect. Nissan completed development of its NP300 Navara in 2014, and the automaker has been at work at least evaluating powertrains for the next Frontier possibly for 2019. Related Video: