This chart shows the fuel used for domestic transportation in the United States. The largest amount is used in the form of gasoline by light-duty vehicles. The second largest portion is used in the form of diesel fuel in medium- and heavy-duty vehicles. Air travel consumes 9% of transportation petroleum, primarily in the form of jet fuel. Water and rail travel together consume 6% in the form of diesel fuel and some gasoline and electricity. Finally, pipelines consume 4% of transportation fuel, mostly in the form of natural gas.

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