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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.

Jaguar E-Type with Supra's 2JZ debuts at SEMA looking fly and fast

We hope you’re not bored of seeing Toyota 2JZ engine-swapped cars, because this one sure does capture our attention. The 1969 Jaguar XKE 2+2 youÂ’re looking at here is unlike any E-Type youÂ’ve seen before, and while it still has a straight-six under the hood, pretty much everything else about the coupe has fundamentally changed. In a nod to just how beautiful the E-Type is to begin with, its design is only different in this Eneos build because it needs to be. Fender flares were designed and 3D-printed by Illumasthetic, and they were then strengthened with carbon fiber. Why did it need the flares? Well, thatÂ’s because the 2JZ-GTE 3.0-liter turbocharged inline-six from the Supra produces far more power than the E-Type ever did, requiring a lot more rubber to keep things straight. Of course, the Supra engine isnÂ’t stock, as itÂ’s been modified with Deatschwerks injectors, a Nuke Performance fuel system, CP-Carillo pistons and rods, a Borg Warner EFR 8474 turbo, Vibrant Performance intercooler Â… the list goes on forever. Output is estimated at about 750 horsepower. The Frankenstein theme continues with the E60 generation 535i rear subframe suspension and differential out back. Meanwhile, it uses the five-speed manual transmission from an E36 generation M3. The front suspension is custom, and while BMW brakes are used in the rear, Eneos chose brakes off a 2003 Chevy Corvette up front. The 17-inch Rotiform STL wheels are wrapped with Bridgestone Potenza RE-71 RS tires. Inside, this Jag-yota gets a full roll-cage, Tillett seats, an OMP steering wheel and a whole lot more. Eneos credits Faruk Kugay as the carÂ’s builder – Kugay previously built some rather creative cars, like a 997 Porsche 911 GT3 with a Subaru Impreza STI EJ25 engine and an E30 BMW 3 Series with a Honda S2000Â’s 2.0L engine. This Jaguar takes the wild engine swaps and engineering to totally new heights, though, and we canÂ’t help but simply love the way itÂ’s been executed. Related Video

Carmakers ask Trump to revisit fuel efficiency rules

Car companies operating in the US are required to meet stringent fuel efficiency standards (a fleet average of 54.5MPG) through 2025, but they're hoping to loosen things now that President Trump is in town. Leaders from Fiat Chrysler, Ford, GM, Honda, Hyundai, Nissan, Toyota and VW have sent a letter to Trump asking him to rethink the Obama administration's choice to lock in efficiency guidelines for the next several years. The car makers want to revisit the midterm review for the 2025 commitment in hopes of loosening the demands. They claim that the tougher requirements raise costs, don't match public buying habits and will supposedly put "as many a million" jobs up in the air. The Trump administration hasn't specifically responded to the letter, although Environmental Protection Agency nominee Scott Pruitt had said he would return to the Obama-era decision. The automakers' argument doesn't entirely hold up. While the EPA did estimate that the US would fall short of efficiency goals due to a shift toward SUVs and trucks, the job claims are questionable. Why would making more fuel efficient vehicles necessarily cost jobs instead of pushing companies to do better? As it is, even a successful attempt to loosen guidelines may only have a limited effect. All of the brands mentioned here are pushing for greater mainstream adoption of electric vehicles within the next few years -- they may meet the Obama administration's expectations just by shifting more drivers away from gas power. This article by Jon Fingas originally appeared on Engadget, your guide to this connected life. Related Video: News Source: ReutersImage Credit: Daniel Acker/Bloomberg via Getty Images Government/Legal Green Chrysler Fiat GM Honda Hyundai Nissan Toyota Volkswagen Fuel Efficiency CAFE standards Trump