America’s Least Eco-Friendly Vehicles

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20. Bentley Flying Spur
> CO2 released per mile: 604 grams
> Fuel efficiency: 15 mpg
> Annual fuel cost: $2,800

19. Bentley Continental GT Convertible
> CO2 released per mile: 604 grams
> Fuel efficiency: 15 mpg
> Annual fuel cost: $2,800

18. Toyota Tundra 4WD
> CO2 released per mile: 606 grams
> Fuel efficiency: 15 mpg
> Annual fuel cost: $2,450

17. Mercedes-Benz AMG GLE 63
> CO2 released per mile: 611 grams
> Fuel efficiency: 15 mpg
> Annual fuel cost: $2,800

16. Mercedes-Benz AMG GLS 63
> CO2 released per mile: 615 grams
> Fuel efficiency: 14 mpg
> Annual fuel cost: $3,000