Gas guzzlers need not apply.
Based on scoring by GreenerCars.org, here's a list of the top 10 greenest cars of 2013. Miles per gallon, specifications and the Green Score are from GreenerCars.org. Miles per gallon equivalent are from FuelEconomy.gov; Manufacturer's Suggested Retail Prices are from the manufacturer.
GreenerCars.org creates its Green Score based on tailpipe emissions, fuel consumption and gas emissions, which contribute to climate change. The scale goes from zero to 100, with a lower score indicating a car with less environmental impact.
By Mitch Strohm, Bankrate.com