The one thing that governments in all parts of the world are worried about is the fact that fossil fuel reserves are depleting faster than anybody would have expected a decade of two ago, and there is currently not many sources of fuel that can take over the burden. However, this is not stopping researchers from coming up with potential sources of clean fuel, which are renewable, less polluting and offer the same benefits as conventional fossil fuel. One such product is biofuel, which anyone can produce, even at home, and use it directly in an internal combustion engine. While these researchers are proposing growing large quantities of corn or sugarcane to produce ethanol, there are a few who believe that we waste a lot of products, which can be used to produce the same thing, without causing any significant change in the food growing cycle. Here are some of the bizarre raw materials that interestingly can be used to produce clean biofuel.