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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.

Scion trying to build business case for FR-S convertible as Subaru bows out

Hope may remain for a convertible version of the Scion FR-S, according to a report from Ward's Auto. You'll recall that rumors were swirling about the feasibility of a rear-drive Toyobaru convertible as early as October, and that back in November, Subaru - which makes the FR-S, Subaru BRZ and Toyota GT86 - essentially nixed the idea of an open-topped variant.
"We make the car, so if we don't make it, it can't happen," brand chief Yasuyuki Yoshinaga told Automotive News, according to Ward's, at the Tokyo Motor Show. "Our engineering department told me that losing the entire roof requires a complete redesign of the structure. It would need a big change."
Despite Yoshinaga-san's arguments against a droptop variant, Toyota is apparently still considering the model. Speaking to media at the 2014 North American International Auto Show, Scion's US vice president, Doug Murtha, hinted that the rear-drive droptop was in the works.

Toyota close to unveiling 4th-generation Prius hybrid

The timing isn't perfect, but Toyota is getting close to rolling out the next generation of its Prius gas-electric hybrid car. Low gas prices have depressed sales of hybrids, with Prius sales falling 14 percent in the first five months of this year. The US government expects gasoline to average $2.44 a gallon this year, compared with $3.36 a gallon in 2014. North American CEO Jim Lentz said Thursday that the new Prius will get better gas mileage than the old one and is better looking. He cautioned that reports of a 15-percent improvement in fuel economy are probably too high. The current Prius gets an estimated 50 mpg in combined city and highway driving. He also said the new version has a lower center of gravity for better handling. Lentz said Toyota, the market leader in hybrid sales, will continue to develop new hybrids even though sales of alternative-fuel cars as a segment are down about 15 percent for the year. "With lower fuel prices, it's having an impact on the entire segment," he said. "But long term, it's still the player. We've seen these rises and falls in fuel prices in the past. " Lentz wouldn't say exactly when the fourth-generation car will debut. The Prius was last revamped six years ago in 2009. Lentz made his remarks Thursday at a groundbreaking ceremony for a $126 million expansion of its technical center on two campuses near Ann Arbor, MI. The moves will bring about 335 jobs to the area from other Toyota locations. The AP contributed to this report.