Washington, DC [RenewableEnergyAccess.com] The American Council for an Energy Efficient Economy (ACEEE) has updated its list of the “greenest” vehicles for 2006, and an ultra-clean version of the Honda Insight has stolen the lead from its constant competitor, the natural-gas-powered Honda Civic GX. Honda and Toyota still hold the top five spots, while clean-burning versions of the Pontiac Vibe, Chevrolet Cobalt, and Saturn Ion also made the top-twelve list. But as noted in the “Market Trends” section of ACEEE’s website, the real news is that the vast majority of this year’s greenest vehicles are widely available coast-to-coast. While in previous years, the list was dominated by vehicles for sale only in California, today about three-quarters of the greenest vehicles can be purchased in any state. The ACEEE Green Book Online analyzes vehicles on the basis of their “Green Score,” a measure that incorporates unhealthy tailpipe emissions, fuel consumption and the emissions of greenhouse gases. Full access is available by subscription, but many highlights are available for free. Information courtesy of the Dpt. of Energy Efficiency and Renewble Energy’s EERE Network News.