What is defined as vehicle fuel other than gasoline?

The term for vehicle fuel other than gasoline is "alternative fuel." This classification encompasses a variety of fuels that can be used in place of or in addition to traditional gasoline. Alternative fuels include, but are not limited to, electricity, hydrogen, propane, natural gas, biodiesel, and ethanol, among others. The significance of alternative fuels lies in their potential to reduce greenhouse gas emissions, enhance energy security, and provide options for diversifying the energy supply for transportation.

While hybrid fuel may refer to the combination of gasoline and electricity in hybrid vehicles, it does not serve as a broad category for all non-gasoline fuels. Ethanol, often used as a fuel or fuel additive, is a specific type of alternative fuel derived from plant materials but does not represent the entirety of what alternative fuels encompass. Similarly, biofuel refers to fuels produced from biological materials, which is just one segment of the broader category of alternative fuels. Therefore, the most comprehensive and accurate definition of fuel that differs from gasoline is encapsulated by the term alternative fuel.