In the substituteprocess of gasoline engine, FS(nonoil) motor gasolinewas focused widly withits characteristics ofenergy conservation, environmental protectandkineticproperty.
Tax breaks for wind, ethanol, solar and other nonoil sources popped up in 1992, expired in 1999 and were renewed only intermittently, most recently in 2005, when Congress voted a two-year extension.