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This amount includes $100-million in civil penalties, the largest such fines in EPA history.

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What, you expected the "fastest muscle car ever" to help fleetwide fuel economy? Nope, don't think that's going to happen. That means Fiat Chrysler will likely to continue to languish at the bottom of the heap when it comes to fleetwide fuel economy among the largest automakers serving the US, especially as the automaker starts to sell its Dodge Challenger SRT Hellcat. A few hundred Fiat 500E electric vehicles aren't going to turn the trend around.

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Talk about a report both green-car advocates and gearheads can celebrate. The US Environmental Protection Agency (EPA) put out its annual Light-Duty Automotive Technology, Carbon Dioxide Emissions, and Fuel Economy Trends report. And the 148-page study has something for everyone.

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The agency thinks the new approach will result in more realistic ratings, especially for hybrids.

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The Environmental Protection Agency (EPA) is turning to a company whose home base is as old-school Rust Belt as one can get, but the company's specialty's undeniably new-school technology. The EPA has struck a deal with Pittsburgh-based ANSYS to model simulations of internal combustion engines. And while the models will be theoretical, the EPA is shooting for some very real results.

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If nothing else, the US Environmental Protection Agency (EPA) is doing its best to ensure that not too much of that notorious Beijing smog wafts its way over here. The regulator once again smacked a China-based maker of recreational vehicles and engines with a penalty for violating the country's Clean Air Act. This time, it was American Lifan Industry.

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Two China-based companies and a US-based importer affiliate were fined a combined $725,000 by the Environmental Protection Agency (EPA) for their roles in bringing in motorcycles and recreational vehicles from China that didn't comply with federal clean-air laws.

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Korean automakers could pay as much as $395 million to affected consumers

Thirteen months after a government investigation revealed Hyundai and Kia Motors had overstated the fuel economy of thousands of cars sold in the United States, the two automakers have proposed a settlement.

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Zoom-Zoom, indeed. Toyota may be the world's biggest maker of hybrids and Nissan may be making big strides on the plug-in front with increased sales of its Nissan Leaf electric vehicle, but it's Japanese automaker Mazda that has once again topped the Environmental Protection Agency's (EPA) list of most fuel-efficient automakers selling vehicles in the US, increasing its Model Year 2012 average by half a mile per gallon compared to MY2011.

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Ethanol supporters say they're digging in their heels and will do whatever they can to get the Environmental Protection Agency (EPA) to reverse a recent proposal to reduce the minimum levels of ethanol required in the domestic fuel supply, the Des Moines Register says.

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Fuel-reduction credits for glazed windows? Well, Mercedes-Benz parent Daimler maybe be reaching on that one, but the German automaker is making a case that many of its amenities, including its stop-start feature, should be given a little more love from the US Environmental Protection Agency (EPA), Automotive News reports.

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An effort by diesel truckmakers such as Daimler and Volvo to effectively block Navistar International Corp. from making non-compliant engines and pay a compensatory fine to the US Environmental Protection Agency (EPA) has gone, yes, up in a cloud of exhaust smoke, Bloomberg News reports.

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The Environmental Protection Agency is preparing a public report that will detail industry-wide audits of automaker fuel economy claims. Automotive News is reporting that the EPA ran tests on 20 or more car and truck models this year, with the goal of testing the veracity of OEM claims regarding fuel economy testing procedure.

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The gap between the estimated fuel economy demonstrated on a car's window sticker, and that which is achieved while driving in the real world, has always existed. Further, there has always been a difference between the mile-per-gallon numbers submitted to the Environmental Protection Agency by automakers, and those that the agency has garnered for itself in independent testing. In fact, according to an Automotive News report, the EPA believes that gap has gotten "unacceptably high" over recent y

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With the second day of the US federal government shutdown now behind us, we're getting a lot of information on how the closure is affecting people across the country. For the green car world, the biggest impact we know of right now is that the US Environmental Protection Agency is operating with a skeleton staff. According to Reuters, the EPA "will take one of the biggest hits of any federal agency" and only has seven percent of its work force at the office today.

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One California-based consultant just got busted for double-dipping on four-wheelers. Chi Zheng, whose Los Angeles-based companies MotorScience Inc. and MotorScience Enterprise Inc. specialized as a consultant for all-terrain vehicle imports from China, had his companies fined $3.6 million for violating emissions requirements, according to the US Department of Justice, US Environmental Protection Agency and the California Air Resources Board (CARB). The companies were hit with a $3.55 million fin

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It's not quite the Hells Angels at Altamont, but another biker group is being accused of piling on, this time by ethanol advocates.

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The battle lines on the ethanol in the national gasoline supply debate are getting more and more defined, or at least more legal. The fight between the ethanol industry and Big Oil (represented by the American Petroleum Institute, an association of 500 oil and natural gas companies) has bee winding through the courts, but now API is telling the Supreme Court just how bad E15 is bad for engines.

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Hybrid and plug-in vehicle drivers overly satisfied with what they think is their great effect on the environment may want to get a look at a recent and quite long report released by the US Environmental Protection Agency (written by Abt Associates) about the overall effects of lithium-ion battery production and use.

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The news keeps getting better for Nissan and its efforts to boost sales of its all-electric Leaf: the Environmental Protection Agency (EPA) ahs confirmed that the EV's range is about 15 percent better than it used to be.

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