hue1350 2012-02-09 15:08:28

 Over the past several decades, fossil fuels have been polluting the environment.

Biofuels can be made from renewable natural resources whereas fossil fuels are non-renewable resources. Corn ethanol fuel and fuel made from switch grass are two of the most promising alternative fuels or biofuels. The main goal of biofuels is to reduce our dependency on buying oil from the Middle East and produce fuel locally.

One advantage of corn ethanol is that it burns hotter than gasoline.Although this is good for engine efficiency; corn ethanol has lower energy content. This means that it takes more corn ethanol fuel to produce the same amount of power compared to engines using gasoline. Other disadvantages relate to the energy needed to grow the corn, transport it to the refinery plant and process it into ethanol. The entire process is very energy intensive and wasteful land. Despite these drawbacks, corn ethanol fuel has become very popular. The U.S.government has encouraged farmers to sell their corn to biofuel refineries, which has caused prices to rise substantially-much more than any other biofuel source and more than selling corn for animal feed.