In general,between 1990 and 2010,the fuel efficiency of vehicles sold in the United States has

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The fuel efficiency of vehicles sold in the United States between 1990 and 2010 showed only a slight increase, not a dramatic change. While there were improvements in technology and efforts to increase fuel efficiency, the overall increase was modest, not doubling or increasing by 50%. Additionally, despite the addition of pollution control devices, fuel efficiency did not decrease by 30%.

In General,between 1990 and 2010,the Fuel Efficiency of Vehicles Sold