Hybrids run on gas but are super efficient because their engines run at the perfect speed all the time. This trick is done with batteries and an electric motor. This gives them great gas mileage.

What you hear about hydrogen is mostly hype—it’s only true in some tricky way. (Bush’s H-hype explained)

They say: Hydrogen (H) comes from water and does not pollute.

Reality: Making H from water takes fossil fuel and does pollute. Making 1 unit of H energy takes 1.15 units of fossil energy.   (See also Freedom Fuel.)