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There are certainly plenty of good reasons to standardize the terminology for a vehicle's CO2 emissions in advertising. Earlier this year, more than one company has gotten into a bit of hot water over misleading ads (see examples regarding Toyota and Lexus and Hummer) and it could certainly help buyers better understand how a potential new car would spew carbon compared to others if a standard label was applied to CO2 emissions. Europeans might soon get such a label. The European Automobile Ma