Alternative Fuels for Internal Combustion Engines

In this century it is believed that crude oil and petrolem products will become very scarce and costly. Day-to-day fuel economy of engines is getting improved and will continue to improve. However enormous increase in number of vehicles has started dictating the demand for fuel. Gasoline and diesel will become scarce and most costly in the future. With increased use and the depletion of fossil fuels alternative fuel technology will become more common in the coming decades.