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 Nissan Forum is a new concept minivan that will debut at the 2008 North American International Auto Show. It is expected to become a production version of next-generation Nissan Quest (North America) and Nissan Presage (Asia).”””
Source: http://en.wikipedia.org/wiki/Nissan_Forum
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