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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.

2016 Chevrolet Silverado 1500 Quick Spin [w/video]

The Silverado 1500 gets what most would consider an early update for 2016. Just two years into this generation, the half-ton Chevy truck has been given a visual overhaul and a handful of feature upgrades. Chevy reps say they didn't wait the usual three years for a refresh because they knew the domestic competitors were planning updates of their own for 2015. We're told the fast refresh was always in the plans, and that it wasn't a response to critics (like us) saying "meh" to the new truck's design, which some felt hewed too close to the GMT900s that came before. If a Ford grille that reaches halfway into the headlights is good, a Chevy grille that cuts the units clean in two must be better. That's at least how we imagine the designers' thought process went. Those new split lights use HID projectors on lower models and full-LED tech on the upper trims, with all versions getting LED daytime running lights. LED taillights are also included on the fancier models. <p>Your browser does not support iframes.</p> Each of the eight trim levels has its own look, and the differentiation goes beyond the placement of chrome and the color of cladding. Look closely and you'll see that elements of the various grille treatments are repeated within the headlights. It's a neat touch, and proof that attention to detail is still a thing. Chevy also reshaped the hood, with sharp lines and pockets that look like they'll do a great job of collecting snow come winter. We get why a Corvette has troughs in its hood (you know where the wheels are and see through the valley to the road) but the surfacing on the Silverado's engine hat has only aesthetic benefits. On the feature front, almost all 2016 Silverado models get standard Apple CarPlay and Android Auto support; the 7.0-inch screen includes both, while the available 8.0-inch screen will add Android Auto through an update in March of 2016. The top High Country trim gets new power-articulating side steps as an option. In addition to swinging down to help you hoist yourself in through the door, the steps have a button at the rear that, when pressed, motors them down and rearward to give you a foothold at the front of the bed. Chevy also catches up to the competition with an available remote-locking tailgate. Chevy also gets further into the competitive numbers game for 2016 with expanded use of its eight-speed truck transmission.

Weekly Recap: BMW rolls out ambitious plug-in hybrid electric plan

"We believe that for the United States, this is going to be very important." – Julian Arguelles Let there be no doubt, BMW is serious about electric vehicles. The German automaker said this week it will make plug-in hybrid versions of all of its core models, an aggressive move that demonstrates its commitment to electric propulsion systems. BMW did not specify which vehicles will get the plug-in systems or provide a timeline for when they will arrive. But the announcement is clearly more than blustering, and the company revealed a 3 Series plug-in prototype this week at an event in France. BMW said the 3 Series uses a version of its 2.0-liter turbocharged four-cylinder engine (240 horsepower, 300 pound feet of torque) with an electric motor sandwiched between the engine and transmission in place of the torque converter. It has an all-electric range of 22 miles. A plug-in X5 with the same powertrain was also displayed alongside the 3 Series, though the X5 has been on the auto-show circuit for more than a year, including a recent stop in Los Angeles. Those two vehicles use "eDrive," and BMW's plans represent the first widespread transfer of its technology from development of the i3 and i8 models to more mainstream products. BMW said it's developing electric powertrains so they can be deployed rapidly across its range, and they are flexible enough to be used with fuel cells in future products. Enticingly, BMW is also working on a "Power eDrive" system, which debuted in a 5 Series GT concept at the event in France. This setup has two electric motors powered by a 20-kilowatt-hour battery pack, and when teamed with a four-cylinder turbo, pump out about 670 hp. Reinforcing BMW's commitment, the company will add more than 200 jobs at its factory in Dingolfing, Germany, to support electric-vehicle development. The moves come as BMW and other automakers diversify their portfolios while fuel economy and emissions regulations are getting tighter around the world. The United States has set a 54.5-mpg CAFE requirement for the 2025 model year. BMW said the electric vehicles were developed with an eye toward the US market, its government policies and its wide-ranging commuting styles. "We believe that for the United States, this is going to be very important," spokesman Julian Arguelles said. Ben Scott, a senior analyst in London with automotive research firm IHS, said BMW's moves are expensive – but necessary – to keep pace with the market.