Oil dominant source of energy
The dominant source of transport energy is oil. There are some alternatives: There are some hybrid and electric cars, powered by either renewable energy, or fossil fuels (coal, oil and natural gas) powered energy. There are still some sailing ships. Bicycles use renewable energy (legs) for transport. EIA projects that domestic crude oil production will remain about 9.4 million barrels/day through 2025, and will rise to 11.3 million barrels/day by 2040, an increase of nearly 20%. According to the EIA, a modest decrease in transportation energy will occur despite an estimated population increase in the range of 50 to 75 million,