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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.

Nissan's Carlos Ghosn taps the brakes on autonomous car progress

"Self-driving cars remain a long way from commercial reality."
Nissan CEO Carlos Ghosn shocked the automotive industry last year when he announced that his company plans to offer consumers an autonomous car by 2020. The automaker even showed off its self-driving Leaf prototype as proof. He was bolder recently with the pronouncement that select markets could have them in 2018, if laws allowed. The boss' optimism appears to be waning, though, and he's now sounding a lot more conservative about the future. While driverless vehicles are still on the way, Ghosn is hedging his bets with a more gradual implementation of several systems.

Carlos Ghosn's detention extended over fresh allegations

TOKYO — A Japanese court on Friday approved the detention of former Nissan Chairman Carlos Ghosn through April 14 after his latest arrest over financial misconduct allegations, a move that has raised questions among legal experts. The former star executive was taken into custody Thursday over fresh allegations that $5 million sent by a Nissan Motor Co. subsidiary and meant for an Oman dealership was diverted to a company effectively controlled by Ghosn. Ghosn spent nearly four months in detention and was just released last month after meeting stringent bail conditions while he awaits trial over earlier allegations that he under-stated his compensation in financial documents, had Nissan shoulder his personal investment losses and made dubious payments to a Saudi businessman. The Tokyo District Court on Friday approved the initial 10-day detention request from prosecutors, who can seek another 10-day extension before needing to file charges against Ghosn, release him or accuse him of fresh misconduct that needs investigating. Stringing out a suspect's arrest for the full 20 days and then raising fresh accusations is common in Japan, where it is known as a "rearrest." Critics say it allows suspects to be grilled by the authorities, resulting in some signing confessions to crimes they never committed. But it is rare for a suspect to receive bail and then be taken back into custody. Ghosn, 65, was first arrested Nov. 19 and released March 6 on 1 billion yen ($8.9 million) bail, after two previous rearrests. He says he is innocent of all allegations. Prosecutors argue the latest allegations are different from the previous ones, but his legal team says they are part of the same scenario of alleged wrongdoing. In demanding the latest detention, prosecutors argued Ghosn may tamper with evidence related to the fresh allegations. Prosecutors had earlier fought against bail for Ghosn, a citizen of France, Brazil and Lebanon, arguing he was a flight risk. Ghosn's lawyer Junichiro Hironaka pointed out prosecutors have already raided Ghosn's property and taken everything, leaving little to tamper with.