The definition of alternative fuel varies according to the context of its usage. In the context of petroleum substitutes, the term 'alternative fuel' can imply any available fuel or energy source, and does not necessarily refer to a source of renewable energy. In the context of environmental sustainability, 'alternative fuel' often implies an ecologically benign renewable fuel.
Alternative fuels, also known as non-conventional fuels, are any materials or substances that can be used as a fuel, other than conventional fuels. Conventional fuels include: fossil fuels (petroleum (oil), coal, propane, and natural gas), and also in some instances nuclear materials such as uranium. Some well known alternative fuels include biodiesel, ethanol, butanol, chemically stored electricity (batteries and fuel cells), hydrogen, methane, natural gas, vegetable oil, biomass, and peanut oil. [acura radiator]
“””The Laguna Coupe, which is slated to reach production in another year, shares its platform with the Laguna sedan. Renault says the two-door, which is painted Aluminum White, is intended to appeal to “40-somethings who are passionate about automobiles and
motorsport.”””
Source: http://en.wikipedia.org/wiki/Renault_Laguna
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