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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.

Auditor had questioned Nissan on payments in Ghosn scandal, source says

TOKYO — Nissan's auditor had repeatedly questioned transactions at the heart of allegations of financial misconduct by former chief Carlos Ghosn, but Nissan said they were proper, a person with direct knowledge of the matter said on Wednesday. Ernst & Young ShinNihon LLC questioned Nissan's management several times, chiefly around 2013, about purchases of overseas luxury homes for Ghosn's personal use and of stock-appreciation rights that were conferred on him. But the Japanese automaker said the transactions and financial reporting were appropriate, the source told Reuters on condition of anonymity. The revelation shows Nissan and its auditor were discussing the transactions, in apparent contrast with Nissan's contention that the alleged misreporting of benefits for Ghosn was masterminded by Ghosn and a key lieutenant. A spokesman for EY ShinNihon, the Japanese affiliate of global accounting firm Ernst & Young, said he could not comment on specific cases. A Nissan spokesman declined to comment. Ghosn was arrested on Nov. 19 as he arrived in Japan. Prosecutors accuse him of falsifying Nissan's annual reports to understate by about half his total compensation of some 10 billion yen ($90 million) over several years. The high-profile former executive has denied the allegations, according to Japanese media. Ghosn remains in custody and is unable to speak publicly. He is represented by former prosecutor Motonari Otsuru, according to Japanese media. Otsuru's law firm declined to comment on Wednesday, and Otsuru has not responded to requests for comment. Nissan has largely pinned the blame on Ghosn and Greg Kelly, a former representative director who was arrested along with Ghosn on the same allegations. "As a result of the investigation, we are certain these two are the masterminds," CEO Hiroto Saikawa told a news conference on Nov. 19, referring to Ghosn and Kelly. He declined to say whether others at Nissan were involved in the alleged wrongdoing. An internal investigation is ongoing, and Nissan says it is cooperating with prosecutors. Nissan and Mitsubishi Motors have removed Ghosn as chairman in the wake of his arrest. The French member of the three-firm alliance, Renault, retains him as chairman and CEO.

Toyota, Nissan, Honda will work together on hydrogen filling stations

Japan's own version of the Big Three is taking on a transportation effort that's a far cry from the large-engined history of General Motors, Ford and Chrysler. In fact, Toyota, Nissan and Honda are looking to do their part – and maybe a little more – for the environment by working together to collaborate on accelerating the deployment of hydrogen fuel delivery in Japan. More refueling stations means more convenience for prospective hydrogen fuel-cell vehicle owners. Toyota says the specifics, including investment amount and the number of stations to be deployed, will be "determined at a later date." Still, the effort dovetails with that of the Japanese government. That government announced a so-called Strategic Road Map for Hydrogen and Fuel Cells last June and subsequently said it would start offering about $20,000 worth of incentives for fuel cell vehicle buyers. In December, Toyota started selling its first mass-produced fuel cell vehicle, the Mirai, in Japan and said it would almost triple production to 2,000 vehicles in 2016 from 700 this year. Last month, the Tokyo government began talks with Toyota and Honda to collaborate on ensuring that there'd be at least 6,000 fuel-cell vehicles on Japan's roads in time for the 2020 Summer Olympics in Tokyo. Tokyo officials are looking to have 100,000 fuel-cell vehicles on the city's roads by 2025. Check out Toyota's press release below. Toyota, Nissan, and Honda to Jointly Support Hydrogen Station Infrastructure Development Toyota Motor Corporation, Nissan Motor Co., Ltd., and Honda Motor Co., Ltd. have agreed to work together to help accelerate the development of hydrogen station infrastructure for fuel cell vehicles (FCVs). Specific measures to be undertaken by the three manufacturers will be determined at a later date. For hydrogen-fueled FCVs to gain popularity, it is not only important that attractive products be launched-hydrogen station infrastructure must also be developed. At present, infrastructure companies are making every effort to build such an infrastructure, but they face difficulties in installing and operating hydrogen stations while FCVs are not common on the road. Following the formulation of its Strategic Road Map for Hydrogen and Fuel Cells in June 2014, the Japanese government has highlighted the importance of developing hydrogen station infrastructure as quickly as possible in order to popularize FCVs.