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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.

GM marks 500 million vehicles

General Motors is marking a major global milestone, as 500 million vehicles have rolled off its assembly lines since the company's founding in 1908. To mark the occasion, the automaker is continuing to invest in production and offering a one-time discount to some customers. GM North America boss Alan Batey used the festivities to announce the Fairfax Assembly factory in Kansas as one of the sites earmarked for the company's $5.4 billion in upcoming investments. The plant will get $174 million of that money for new equipment and technology to build the 2016 Chevrolet Malibu. Among the upgrades will be a shake-and-rattle booth that will simulate road conditions to find squeaks. To commemorate both the production milestone and the Fairfax plant, Batey and company CEO Mary Barra also gave away a 2016 Malibu to a wounded Iraqi war veteran, and the two execs announced that in the third week in May all GM employees can share a one-time customer appreciation discount with friends to help get them into the automaker's products. Barra also gave a speech to the workers there about some of the other milestone's in the company's history, which you can read below. Innovation on the Line: GM Manufacturing Milestones Many of General Motors' most important innovations have occurred behind the scenes, in its manufacturing facilities. Concepts such as changeover, flexible assembly, automation, computer simulation, machine vision and robotics were developed at GM. Over the decades these innovations have helped enable improvements in vehicle quality, efficiency and competitiveness. 1901: Ransom Olds' famous Curved Dash Oldsmobile, designed with simplicity, reliability and value in mind, was the first American car built in a factory designed specifically for automobiles and in standardized volume production. GM acquired Oldsmobile in 1908. 1908: Cadillac wins the Dewar Trophy, Europe's most prestigious award for precision and excellence in manufacturing, by demonstrating the auto industry's highest standards for precision and interchangeability of parts by disassembling three Cadillacs and mixing the parts randomly before reassembling and driving them before a contingent of judges. 1922: GM hires William Knudsen to lead Chevrolet's turnaround. Knudsen implements flexible mass production, which helps Chevrolet incorporate annual styling changes and take market share from Ford.

Chevy Bolt, GM's 200-mile EV, could debut in Detroit

It's not news that General Motors is working on a $30,000 electric vehicle with a 200-mile range. Then-CEO Dan Akerson said as much back in 2013. What we've heard before is that this mystery EV will be based on the Chevrolet Sonic and will will arrive in 2017. So, if that's all correct, then it would make sense that confirmation of this plan would come at the 2015 Detroit Auto Show, which is just around the corner. And lookee here... The Wall Street Journal is reporting that GM will unveil a concept Chevy Bolt at the Detroit show on Monday. That name sure makes sense, too, since GM registered that trademark back in August. According to the Journal, the rumored numbers – 200-mile range, $30,000 price – are still what's expected. Some new purported details are that the battery will come from LG Chem, which also makes the Volt's batteries, and that the Bolt will be a crossover that could be sold around the world. This all smacks of a preemptive strike against the Tesla Model 3, which is also due around 2017. Currently, GM sells the Spark EV in limited areas of the US, despite a lot of excitement for wider availability. To sell a 200-mile EV for $30,000 means that GM and LG Chem will likely have drastically reduced the cost of making a big plug-in vehicle battery. What this means for the new Volt and GM's future plans is something we're more than a little excited about to learn more of on Monday, the same day that we get to see the redesigned Chevy Volt for the first time. Well, aside from the CES teaser. Green Chevrolet Crossover Electric 2015 Detroit Auto Show Chevy Bolt bolt