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These are the 'Greenest' and 'Meanest' cars in 2015

As has become tradition, the American Council for an Energy-Efficient Economy (ACEEE) has come up with a ranking of what it refers to as the "greenest" cars of 2015, and, by way of contrast, a list of the so-called "meanest" cars, so those who value eco-friendliness over all else can choose which vehicles they should or should not consider buying. As you may expect, electric cars make up the majority of the greenest cars on the list, but, perhaps surprisingly to many, the Tesla Model S didn't make the cut. It's worth noting, too, that where the electricity an owner uses to charge their electric vehicle has a big impact on its overall environmental impact. "A car that is charged using electricity generated from natural gas or renewables is going to have significantly less impact on the environment than one charged on a coal-heavy grid," says ACEEE lead vehicle analyst Shruti Vaidyanathan. The ACEEE's list for 2015 looks very different than it did in 2014. It's an interesting collection, though – and we're sure this goes without saying, really – we'd recommend doing a bit more research into each vehicle and how it might fit into your daily life before making any purchase decisions. Click here to see the ACEEE's list of the Greenest and Meanest vehicles sold in the United States in 2015. Green Bugatti Chevrolet Fiat GM GMC Mercedes-Benz Nissan RAM smart Toyota greenest greenest cars

Honda, Mazda, Mitsubishi, Mercedes also under diesel emissions scrutiny

The controversy over Volkswagen's diesel emissions scandal isn't limited to the US. In Europe, where diesel engines are far more popular, the issue is shining a harsh light on the NEDC emissions test. As already known, the evaluation does a poor job of reflecting real-world production of NOx, and it appears a significant number of automakers are affected. The Guardian in the UK has been reporting on real-world test results from a company called Emissions Analytics. After the latest round of checks, vehicles from Mercedes-Benz, Honda, Mazda and Mitsubishi were found to generate far more NOx than they should. The newspaper also published similar results for Renault, Nissan, Hyundai, Fiat, Volvo, Jeep, Citroen, VW, and Audi. On average, the figures are about four times over the limit of producing the pollutant. Unlike VW and its defeat device, these automakers aren't actually breaking the rules. The vehicles perform up to the NEDC lab test for emissions, but those results simply aren't translated to the street. "The VW issue in the US was purely the trigger which threw light on a slightly different problem in the EU - widespread legal over-emissions," Nick Molden from Emissions Analytics said to The Guardian. A big fight to decide the future of this issue appears to be on the horizon. Automakers claim that they can't meet the next round of tightening emissions regulations and are asking for compromises. Although, spokespeople for Mercedes and Honda told The Guardian that the brands would be in favor of the stricter rules. Meanwhile, some European governments began backtracking their support of diesels well before this scandal came to light. The added scrutiny certain hasn't helped the future of the oil-burner. Related Video:

Brabus takes Mercedes-Maybach even further

Hard as it may be to imagine for most, even the flagship Mercedes-Maybach S600 won't be enough for some. And those individuals can now turn to Brabus to customize their limousines even further. The latest tuning package includes an array of enhancements, starting with the engine. That's where Brabus has installed all the upgrades from the Brabus Rocket 900, boring the 6.0-liter twin-turbo V12 out to 6.3 liters, and producing a massive 887 horsepower and 1,106 pound-feet of torque. That'll propel the limo up to an Autobahn-crunching top speed quoted at 217 miles per hour, reaching 62 in just 3.7 seconds. Buyers going for the less potent Maybach S500 offered in certain markets can also opt for the Brabus B50-540 performance kit, which offers 83 extra hp and a further 88 lb-ft of torque. Brabus has also fitted a choice of 21-inch wheels, retuned suspension dropped by an inch, a full aero kit, and new radiator grille. And as sumptuous as it is already, the tuner is also offering upgrades to the interior with special leather and Alcantara upholstery, wood and carbon-fiber trim, and its full iBusiness suite. All of which promises to make the flagship Mercedes even more expensive, of course, but if there was ever an example of "if you have to ask, you can't afford it," surely the Maybach is it. BRABUS refines the new Mercedes-Maybach 662 kW / 900 HP, 1,500 Nm, top speed 350 km/h plus, high-tech forged wheels, sporty-elegant design and even more luxurious BRABUS fine leather interiors The new Mercedes-Maybach represents the absolute pinnacle of state-of-the-art automotive engineering. Nonetheless, even this luxury sedan offers room for individual refinement, which BRABUS (Brabus-Allee, D-46240 Bottrop, phone + 49 / (0) 2041 / 777-0, fax + 49 / (0) 2041 / 777 111, internet www.brabus.com) realizes with a select team of the best engineers, designers, technicians and master craftsmen. The BRABUS ROCKET 900 6.3 V12 twin-turbo increased-displacement engine provides the Mercedes-Maybach S 600 with an enormous rated power output of 662 kW / 900 HP (887 bhp) and a peak torque of 1,500 Nm (1,106 lb-ft). Top speed is in excess of 350 km/h (217 mph). To match the extreme performance of the luxury liner, the appearance of the four-seat car receives some sporty-elegant emphasis with BRABUS aerodynamic-enhancement components and BRABUS Monoblock "PLATINUM EDITION" 21-inch forged wheels. Another BRABUS domain is exclusive interior design.