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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.

Why this could be the perfect time for Apple to make a car play

While the automotive and technology worlds have been pouring billions into autonomous vehicles (AVs) and preparing to bring them to market soon as shared robo-taxis, Apple has mostly sat on the sidelines. Of course, Apple is the last company to ever make its intentions known, and the super-secret tech cult giant hasn't been totally out of the AV game based on the clues that have slipped out of its Cupertino, Calif., citadel over the past few years. Related: Apple self-driving cars are real — one was just in an accident News first broke in 2015 that it had assembled an automotive development team, in part by poaching high-profile talent from car companies, to work on a top-secret self-driving vehicle project code-named Titan. (Thank you very much, Nissan.) Apple also subsequently broke cover by making inquiries into using a Northern California AV testing facility and receiving a permit to test AVs on public roads in California. But then as the AV race started to heat up in the last few years, Apple reportedly began scaling back its car activities by downsizing team Titan. More recently, Apple's car project has shown signs of life with the hiring a high-level engineer away from Waymo and luring one Tesla's top engineers and a former employee back to Apple. It also inked a deal with Volkswagen to provide a technology platform and software to convert the automaker's new T6 Transporter vans into autonomous shuttles for employees at tech company's new campus. That is a far cry from giving rides to Wal-Mart shoppers, like Waymo is doing as part of its AV testing in Phoenix. But this could be the perfect time for Apple to enter the AV market now that ride-sharing is reaching critical mass and automakers and others are planning to deploy fleets of robo-taxis. Apple could easily establish a niche as a high-end ride-sharing service – and charge a premium – given its cult-like brand loyalty and design savvy. The growth of car subscription models could also play in Apple's favor since is already has many people hooked on paying for phones in monthly installments – and eager to upgrade when a new and better model becomes available. To achieve this, some believe Apple will fulfill co-founder and CEO Steve Job's dream of building a car. And as the world's first and only $1 trillion company it's sitting on a mountain of cash that certainly gives it the means. But other tech darlings like Tesla and Google have discovered how difficult it can be to build cars at scale.

Nissan expands US EV test market for e-NV200 to Portland

Of course, it's going to be Portland. Oregon's largest city, known for its green-friendly vibe and policies, will be where Nissan will next test of its all-electric e-NV200 cargo van. And we hope those vans have cup holders for the inevitable java. The Japanese automaker is working with local utility company Portland General Electric (PGE) on a six-week trial program. Nissan and PGE will record data to better measure how the concept of battery-powered driving works within the local services network. The location makes sense, as Portland is one of the five best-selling US cities when it comes to sales of the Nissan Leaf, which shares its powertrain with the e-NV200. Nissan kicked off its "No Charge to Charge" free-charging program for new Leaf owners in April. Nissan, which had already been testing the e-NV200 with FedEx in Germany, Japan and Singapore as of late last year, said at the Washington Auto Show in January that it would start testing the electric van in the Washington, DC, area. Nissan said at the time that it helped install about 570 fast-charging CHAdeMO chargers throughout the US since last year, including 200 in December alone. Check out Nissan's press release about the Portland project below. LEADING EV MARKET PORTLAND BECOMES TEST BED FOR NISSAN E-NV200 ELECTRIC COMMERCIAL VEHICLE PORTLAND, Ore. – Portland, already a top breeding ground for electric vehicle (EV) sales, is now the proving ground for Nissan's prototype electric commercial vehicle – the Nissan e-NV200. Nissan is working in collaboration with Portland General Electric (PGE) on a six-week trial to help determine the viability of an electric commercial vehicle in the U.S market. PGE has assigned the e-NV200 into its fleet of vehicles with an underground crew, replacing a larger, diesel-powered van. "Oregon has been a top five market for Nissan LEAF sales in the U.S. due to proactive policies at the state level to encourage EV adoption, as well as robust charging infrastructure championed by the state and others like PGE," said Toby Perry, Nissan's director of EV Marketing in the U.S. "If we determine that e-NV200 fits into the U.S. commercial vehicle market, we expect that Portland would be a leading driver for sales as well." This year, Nissan is deploying two e-NV200 prototypes with companies such as PGE and FedEx in top U.S EV markets including California, Georgia, Oregon and Washington, D.C.