Could the 1st step in replacing the gasoline car be here? Quite possibly. The holy grail of automobile fuel appears to be hydrogen. Its only emission is water. However, an intermediate step to hydrogen by be natural gas cars. There is currently a lot of interest in natural gas cars. Natural gas burn extremely clean with low emissions.
Natural Gas Vehicle Information
Natural Gas Automobile Conversion Information
While we continue to wait on hydrogen powered cars, this may be a viable alternative. The current price of natural gas for automobile use (measured in GGE or Gasoline Gallon Equivalent, 128 cubic feet of natural gas) is less that gasoline in many markets.
Natural gas cars use compressed natural gas rather than the form typically sent to your home or business.