The correct answer to this open question is the following.
Gasoline is described as a miracle fuel that is so ideal for transportation in that its energy density that allows a so much energy in small amounts.
In the documentary "Switch" of 2012, which was produced by Harry Lynch, Geologist Scott W. Tinker explains the "Switch Energy Project," that refers to the importance of transitioning from fossil fuels such as coal and oil to modern forms of energy to taking care of the environment.