Actually, an alternative to gasoline, diesel, or oil.Will humans ever really find a form of energy fuel that is not polluting, and that could be developed by humans efficiently without having to exploit nature? Solar energy cars don’t pollute, but are much slower. Electric cars are also slower, and if the electricity is gotten from coal, there goes the clean, nonpolluting source. Planes need too much power to fly, so forget about solar or electric. ( i can’t think of solar or electric for an 18-wheeler either). Hydrogen did sound good at first, but then came the issue of turning cars into bombs or how costly it is to mass-produce hydrogen. Will speed and power have to be sacrificed some day in order to stop pollution and natural resource exploitation? Can the Earth’s magnetism ever be used to move ourselves arround?