Which airline is most fuel efficient?
The airline industry uses about 4.5 million barrels of oil per day, or 10 percent of the oil that goes towards transportation. But there's a sizeable difference between the carbon footprints of various airlines: According to recent research from the International Council on Clean Transportation, America's most fuel-efficient major airline, Alaska Airlines, is 26 percent more fuel efficient than Allegiant, the least fuel-efficient.
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