Bus that runs on soybean biodiesel. If you've read or watched the news lately, you've probably come across some article, snippet or sound bite related to oil and oil prices. Even in your daily routines, there's a good chance of someone mentioning it. Whether it's in automotives, economics, history, geography or politics, oil has managed to filter into almost every aspect of our daily lives. It's one of the most discussed (and controversial) commodities that consumers rely on daily.

All of this talk about oil sparks continued interest in gasoline alternatives. Things like electric cars and hydrogen fuel cells are being talked about as feasible alternatives to oil. As technology improves, these concepts could become reality. But what about now?