Rising energy prices and global warming have led to increased interest in alternative fuels. Alcohol has been used as a fuel in other points in history but fossil fuels have become the dominant energy resource for the modern world. Generally speaking, the chemical formula for alcohol fuel is CnH2n+1OH. The larger n is, the higher the energy density. The viability of alcohol as a fuel is a debatable topic, as other energy sources are required for production.
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