The U.S. consumes lots of energy.  Which fuel provides the most energy?

As of the most recent data, petroleum is the largest source of energy consumption in the United States. It is used widely in the transportation sector. Natural gas, which is used heavily in the electric power sector, is the second largest source. Coal, renewable energy, and nuclear electric power are also significant sources of energy in the U.S. However, the exact rankings can vary from year to year based on market conditions, policy changes, and other factors.