By IB Times Staff Reporter | March 29, 2011 1:58 AM EST

Top Ten Most Economical Car Brands (SLIDESHOW)

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Rank by Average CO2 (g/km) - 1 Average CO2 (g/km) in 2010 - 125. 9 Targeted CO2 (g/km) in 2015 - 116.1 (REUTERS/)