Kelley Blue Book has once again released its 10 Best Green Cars of the year, just in time for Earth Day. KBB has been releasing these rankings for years, and has been following all the diverse powertrain offerings that have become mainstream from hybrid, diesel, plug-in hybrid, and even pure battery electric. The KBB team test drove the wide array of products looking for ways consumers can get more miles from each gallon, or to eliminate gasoline altogether. Read on for more details on the best of the green. The Article Kelley Blue Book Names 10 Best Green Cars for Fuel Efficiency appeared first on Automotive Digest.