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 nuclear materials such as uranium. Alternative fuels are derrived from resources other than petroleum. Some are produced domestically, reducing our dependence on imported oil, and some are derived from renewable sources. Often, they produce less pollution than gasoline or diesel.
Almost all of the fuel we use for transportation is made from petroleum. Gasoline and diesel fuel account for all but about one-fourth of one percent of California’s transportation fuel. Most California gasoline does contain a small amount of ethyl alcohol (also called ethanol), which increases the oxygen content of the gasoline for cleaner burning.
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