This article was originally published by Aaron Borderman on Clean Fleet Report, a publication that gives its readers the information they need to move to cars and trucks with best fuel economy, including electric cars, fuel cells, plug-in hybrids, hybrids and advanced diesel and gasoline engines.  What to do when calling it quits on your aging vehicle Most people sell their old car when they get a new one, but what happens if the car is beyond its useful lifespan? In some cases, you might be able to sell a beaten up car to somebody that is willing to repair it, or you…

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