1987 Convertible Corvette 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.

Pics Aplenty: Meet the 2014 Chevrolet Silverado and GMC Sierra [w/poll]

Today was a pretty big day for General Motors, debuting the all-new Chevrolet Silverado and GMC Sierra light-duty pickup trucks ahead of their official showcase at the 2013 Detroit Auto Show. And now that the dust has settled at GM's big reveal event, we've had a chance to snap dozens of photos of the new pickup pair from every angle.
We already told you the important bits earlier today (click here in case you missed it), but let's recap. Under the hood are three new engines - a 4.3-liter V6, 5.3-liter V8 and 6.2-liter V8 (you know, a version of the small-block that'll also be found under the hood of the C7 Corvette), all mated to six-speed automatic transmissions. The 2014 model year marks the return of the Z71 off-road package with Rancho shocks, front tow hooks and beefier underbody protection. Inside, there's a host of new technology and a greater focus on better quality and refinement.
Some of the nitty-gritty specifics (like engine output numbers and fuel economy) have yet to be revealed, and since we haven't driven the finished products yet, it's hard to say how these trucks will fare against rivals like the Ram 1500 and Ford F-150. For now, we can only judge these two books by their covers, and while we do like the designs of the new trucks, we Autoblog staffers are torn on exactly which one looks best.

Chevy Bolt 200-mile EV going into production near Detroit

Where there's smoke, there's fire, apparently. The rumors of the Chevy Bolt going into production have been proven correct, with an announcement this morning at the Chicago Auto Show that the 200-mile, all-electric Bolt will be built at the Orion Assembly facility near Detroit. GM didn't say exactly when the Bolt will be built, but GM North America president Alan Batey said in a statement that, "We are moving quickly because of its potential to completely shake up the status quo for electric vehicles." He's not kidding. GM is talking about a $30,000 price tag for an EV that can do twice as many electric miles as any non-Tesla mass-production EV today. Previous hints have the Bolt starting production next year for a market debut in 2017, and with all of the accuracy we've seen from these secret releases up to now, we're going to say this is probably accurate until we hear otherwise. We still have questions about the price tag, but for now we'll try to track down more information here in Chicago. Chevrolet Commits to Bolt EV Production Game-changing, long-range EV to be built at Orion Assembly facility in Michigan CHICAGO – Chevrolet this morning confirmed production of its next-generation pure electric vehicle, based on the Bolt EV concept. It will be built at General Motors' Orion Assembly facility near Detroit. GM North America President Alan Batey made the announcement ahead of the Chicago Auto Show. The Bolt EV concept was introduced last month at the North American International Auto Show in Detroit. "The message from consumers about the Bolt EV concept was clear and unequivocal: Build it," said Batey. "We are moving quickly because of its potential to completely shake up the status quo for electric vehicles." Leveraging the industry-leading battery technology found in the Chevrolet Volt and Spark EV, the Bolt EV concept was developed as a game-changing, long-range pure electric for all 50 states, designed to offer more than a GM-estimated 200 miles of range at a target price of around $30,000. The progressively styled concept vehicle features selectable driving modes for preferred driving styles, such as daily commuting, and it was designed to support DC fast charging. "We're proud that Chevrolet has decided to produce the Bolt EV here in Michigan at the Orion Assembly facility," Gov. Rick Snyder said. "Michigan unquestionably remains the global automotive leader.