fuel efficiency

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Overstated fuel-efficiency ratings will cost South Korean car companies millions

’A very difficult year’ for Hyundai and Kia gets worse
Up, up and away

Who’s going to pay for fuel efficient planes?

Why are some airlines shelling out tens of billions of dollars to scoop up the latest state-of-the-art planes?
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The trouble with gas sippers

Obama’s new fuel efficiency rules kick the car companies while they’re down—and don’t appeal to the public either