Recently, Martin Hotze posted:

given the fact that there is no oil or gas available (timewarp
yourself to the future): what kind of energy and energy storage would
you use for powering small units like cars?

Well, there appear to be more options than gets typically discussed.
Recently, a local company has gotten a bit of media attention for their
non-poluting engine that could reduce dependence on fossil fuel
consumption, though I think at this point it makes more sense as an
alternative source of electrical energy for home use than for autos.
Still, the inventors think that use in autos is possible.

http://www.cleveland.com/search/inde...l?bttec&coll=2

Regards,

Neil