We don't have credible alternatives. The energy density per unit volume of gasoline is only outmatched by nuclear. Nothing else comes close. Edit: Check out th

We don't have credible alternatives. The energy density per unit volume of gasoline is only outmatched by nuclear. Nothing else comes close. Edit: Check out this chart. Scrub the metals, and compare the remaining sources. We've got a long way to go before batteries achieve parity: https://en.wikipedia.org/wiki/Energy_density#/media/File:Energy_density.svg https://en.wikipedia.org/wiki/Energy_density#/media/File:Ene...