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10. Scion iQWho says hybrid drivetrains, alternative fuel
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10. Scion iQ

Who says hybrid drivetrains, alternative fuel systems or expensive gas-saving technologies are prerequisites for green cars? When it comes to vehicle production and conserving the world's natural resources, significantly fewer materials are required to build a Scion iQ thanks to its petite dimensions, lightweight design and efficient 1.3-liter gasoline engine.(Credit: Handout)

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10 best green cars of 2012

Kelley Blue Book released their annual 10 Best Green Cars of 2012. Kbb's weighed factors such as fuel efficiency, value, features, and comfort.